AITAH for losing interest in a girl who slept with someone else while we dated?

A 21-year-old man, referred to as OP, began dating a woman named Jane about six months ago after connecting over shared interests. After several successful group hangouts, OP asked Jane out, and they proceeded to have four months of positive dates and casual time together.

The relationship took a negative turn when OP learned from a close friend that Jane was seeing another man. Upon confronting her, Jane defended her actions by claiming they were not ‘exclusive,’ a concept OP had not previously considered. Despite this, OP decided to end things because he could not move past the situation. The immediate aftermath involves awkward interactions in shared friend groups, culminating in Jane accusing OP of ‘slut shaming’ him for ending the relationship, leaving OP confused and questioning his own behavior.

AITAH for losing interest in a girl who slept with someone else while we dated?

I (21M) met this girl (21F-Jane) about 6 months ago and I we connected over mutual interests. Conversations were flowing really well and even shared some friends so it was pretty easy to find time to hang out in groups.

Eventually I work up the courage to ask her out and she accepts.

Our dates went along very nicely so of course we keep going out for 4 months now.(About 12 proper dates and meeting each other whenever our friends meet up/going over to each others apartments to hang out)

Eventually it comes out from one of my closest friends that Jane is sleeping with some guy on the side. He found out when he caught them at a club we frequent and told me immediately.

Obviously I confront her about it, feeling hurt. This was my first relationship and it had to end it like this. She argued that we weren’t ‘exclusive’ and that means it wasn’t cheating.

I had no idea such a term even existed in the first place, so I looked it up online and found out it was true. Regardless, I told her it would be better to go our separate ways since I couldn’t get over this.

Whenever our friends meet now, I keep it brief when I speak to her.

This all came to a head when she texted me and told me to stop slut shaming her and making this such a big deal. I don’t understand how she got that idea, I interact normally when I have to speak to her and no one besides my close friend knows about our drama.

I kind of resent her, but I’m not spreading insults or comments about her.

I just feel my first experience dating a girl is a trainwreck. I question if I am being unreasonable or if what I’m doing is offending her.

Here’s how people reacted:

Long-Department3438

I have a different perspective. NTA btw, however I do agree with her about the not exclusive thing.

Going on dates and dating exclusively are two different things.

While I’m sure it hurts, it sucks, and feels weird being in a situation like this, until something is serious atleast in this dating climate, it’s not required of her to stop sleeping with someone else unless until it’s either serious, or it’s something that was stated among the two of you.
I’ve been in the situation before where I was in a situation-ship with someone and we were casually having sex for a while, however it was only until I met someone else that I felt like I could be serious with that I went and ended that situation-ship. However this is something that was communicated by me to both situationship and girl I ended situationship for.

She definitely should have told you that she was still seeing other people, and you should sit down with her and let her know that, “ im not shaming you, I just felt hurt on my end as I thought we were going somewhere. I should have been told that you were seeing others in the beginning, but since I found out this way, I feel different. I have no issues with you anymore, and i hope you feel the same. I wish you the best”

Jokester_316

NTA. She apparently didn’t feel the same about you as you did her. Otherwise, she wouldn’t have been having sex with someone else while entertaining you as a possible boyfriend. You two weren’t compatible. You are worlds apart. She’s got FWB, and you are having your first experiences with dating. She wasn’t the one for you.

Quit taking what she says to you personally. You rejected her based on her lifestyle. Every time she sees you, she’s reminded that you rejected her. You’re not bad mouthing her. You’re not slut shaming. Those are her insecurities coming out. It might be best to keep your distance and block her.

Dramatic-Ad7875

I think people forget “dating” and being in a full blown relationship are very different. On top of that, that’s why I’ve always told people from the jump “Hey just a heads up, I don’t do the dating multiple people at the same time because I’m looking for a meaningful relationship”.
If you guys never had a conversation about it, then yeah she’s well within her rights to do what she wants because you’re not her boyfriend. At the same time she’s in the wrong for getting upset that you don’t want to date her anymore, just because it wasn’t exclusive, doesn’t mean everyone wants to participate in that circus.
Effective_While_8487

So, the guy caught them fucking at the club, or just being together?
I suppose it depends on your (rigid) definition of “Cheating” , but after just 4 months and your first time here, your expectations are unrealistic and she’s more on track with reality. It takes a while to expect some type of exclusivity, unless that’s up front, which it doesn’t sound like it was here. That you broke up a good thing over this suggests you might want to re evaluate your expectations, and at least be up front. Its OK to be possessive, but you need the consent of the possessed for that to work and be fair.

YTA

LazyScribePhil

I’m gonna take a guess that, upset as you were, you probably didn’t speak about what happened in very careful terms to your friends. I’d maybe think over the language you might have used to your close friends and whether some of that language might have got back to her as you have overlapping mutuals. It’s fine to acknowledge two people have different expectations of relationships, but how that gets expressed will make all the difference to how people repeat what they’ve heard about it.
ParadoxLoom

NTA. You’re always allowed to lose interest in someone for any reason and that’s totally okay. Personally, even if there’s no official agreement to be exclusive, I feel like going on regular dates with someone creates an unspoken understanding that we’re not sleeping with other people.

The issue of slutshaming is a bit weird though. Is it possible that your close friend told others in your friend group and they have judged her?

Darthkhydaeus

NTA. Just be honest. The revelation of her other relationship made you realise that what you had was not as special to her as it was to you. She can sleep with whoever she wants. That does not mean you have to just accept it, if thats not your thing.

My only advice going forward is making your intentions clearer sooner. 6 months is a long time to date someone without saying anything about your intent to date exclusively

TheBerethian

NTA

Perfectly reasonable to lose interest – she’s using sophistry anyhow; while it’s true you never said you were exclusive, it’s generally accepted that she’d mention if she were seeing someone else on the side.

You haven’t slut shamed her in the least, just had a difference of opinion in what’s acceptable, and her using that terminology whilst also seeing someone else whilst dating you, means you dodged a bullet.

lonerinreality

NTA It’s a lose lose situation for a guy you will be called controlling if you tell a woman you have just started dating to not speak or sleep with other men but if you don’t say anything you will be expected to just deal with it and in your case you stopped seeing her and now your apparently slut shaming her she pretty much done that herself but being accountable for there actions is not really a thing.
eats-you-alive

Even if you told everyone what she did, how is that shaming? You dated her, she had sex with someone else while that was going on. It’s not like you are telling lies.

I’d tell everyone that wants to know about it. It’s not shaming, it’s telling the truth.

And she is the one who used the term „slut“, not you. Fitting self discription, if you ask me, but you didn’t call her that – she did it herself.

Foreign-West-3033

Cant own another’s sexual appetite. Neither of you are married or were exclusive (according to her), and can date or be intimate with whomever they desire. Doesn’t make either of you bad people, just means your expectations are not equally yolked. Mend your wounded ego, no need to be unfriendly even if no longer intimate. Plenty of fish in the sea for both of you. Best of luck.
Dapper_Internet_8576

Nta any person that talks about “wE wErEnT eXcLuSiVe” is not worth anything more than a pump and dump. Dont waste your time on her.

And if someone asks just tell them the truth – you were going on dates for 4 months and she fucked some rando in the meantime. Every normal person will understand why you got the ick from a cheating cunt

fathersdaysonsunday

NTA but…

When you say ‘Eventually worked up the courage to ask her out’, how long exactly?

Could it be possible she felt obligated to say yes to you asking her out because of the mutual friends involved?

These 12 dates, how many of them were both of you alone and did you have sex in the four months you were ‘dating’.

Easy-Inspector-5781

NTA

You have different life philosophies. You feel hurt because she’s a traitor, no matter how much the internet has normalized that.

Use your time to heal before looking for someone else, and avoid as much contact with her as possible, except for what is strictly necessary during get-togethers.

buttertits4lyfe

NTA. If people want to sleep around while they’re dating they can go ahead but they can’t be surprised to find out that some people are not into that. I would immediately end the relationship if I found out the person I was dating was banging someone else. It’s ridiculous.
-KristalG-

NTA. If she didn’t want to be slut shamed, she shouldn’t have been a slut. You don’t fuck around, while you are dating someone. And this whole “not exclusive yet” is nonsense. Absolutely no one will like finding out their date is fucking someone else in-between.
Purple_Breakdown_09

NTA, what is this even thinking. She cheated and she had the audacity to treat you like this. If she just wants to sleep around then she shouldn’t date.

I’m sorry for the first bad experience. I hope someday you find someone better and nothing like this girl.

r0r0157

That’s firmly clear just based off your headline. It takes someone far more stronger in their convictions, than it is to simply just shrug it off or pin it up to “the new normal”. Having opinions and standards doesn’t make you any less; or the AH.
RankUpLife

This whole sleeping around with other people while you’re going on dates with someone else shit is wild. Don’t worry about what she thinks though. Just tell her you’re not shaming her for being herself and move on. Good luck
BenneB23

Nope. This kills the magic. You’re not slut-shaming her, she just wasn’t loyal to you. It doesn’t matter that you weren’t exclusive. Nothing kills the magic of the first months like your girl getting railed on the side.
Minute-Lynx-5127

In relationships communication is key. This can be a painful lesson to learn but you will be much happier and more successful in relationships if you just talk to the person about how you feel and what you want. 
Lily_Twinklekiss

My first relationship ended on a similarly sour note because we didn’t discuss expectations early on. It sucks now, but trust me, these experiences teach you what to ask and talk about in the future.
Leather_Step_8763

She knows what she did. She’s trying to spin the narrative in her favour. Being honest with anyone that questions this will see that too. Rise above her and find the right one for you
aussie_nub

“Don’t slut shame me!” then don’t act like a slut.

Seriously, do whatever you like, but remember it has consequences and the consequences for this are that you’re not OP anymore.

Charren_Muffet

You can’t slut shame a slut. Secondly, this works both ways, if you are a guy and you pull this legalise nonsense of “we weren’t exclusive”, then you are also a slut.
deviajeporaqui

NTA. It’s reasonable for you to feel hurt but you need to learn a great lesson in relationships. Don’t assume, communicate and set expectations early on. 
iceicebby613

It is totally finenthay she wanted to sleep around while with someone else. She will hopefully take a lesson and not be a cheating asshole in the future.
Prudii_Skirata

NTA

Don’t pay new car prices to ride on a city bus.

(This goes both ways, for the record… fuckbois can also only exist when they’re *allowed* to)

pinkpastrylove

NTA it’s perfectly reasonable to lose interest in someone whose actions and values don’t align with your expectations, especially in a relationship.
Every-Expression-165

NTA, my bro you just dodged a efing ATACAMS filled with red flags. Who the ef is doing this crapp? She is a disgusting human being.
Voxxanne

4 months of dating and she still thinks that you weren’t exclusive? Yeah, she can *fuck* right off. NTA, and you deserve better.
waisonline99

Do yourself a favour and admit she was never into you in the first place.

Let it go and move on.

Plenty more fish in the sea.

Ok-Nefariousness5440

Her conscious is probably bothering her and the fact you changed the way you interact with her is probably getting to her.
Silent_Cod_2949

“We weren’t exclusive” works after 4 days, 4 dates, maybe even 4 weeks – but 4 *months*? Fuck off. NTA. 
80_47

NTA. Anyways it looks like she wasn’t interested in you in contrast to your title of this post.
gts_2022

NTA. She’s trying to minimize how she’s feeling about her lack of self-respect by blaming you.
feraljohn

I like my women like I like my coffee: Without some other guy’s dick in it.
MikeReddit74

NTA. If you don’t want to slut-shamed, don’t be a slut. Easy-peasy.
Chiefman47

Wonder if other guy knows THEY arnt exclusive
Bulky-Cauliflower921

nta 

she’s not relationship material 

Conclusion

OP is currently in an emotionally difficult position, feeling that his first dating experience has ended poorly due to a fundamental disagreement over relationship terms like ‘exclusivity.’ His actions—ending the relationship and interacting minimally with Jane afterward—are perceived by Jane as an attack, creating ongoing tension within their shared social circle.

The central issue revolves around differing expectations regarding commitment level versus perceived betrayal. The reader must consider whether OP was justified in expecting fidelity even without an explicit exclusivity agreement, or if Jane’s definition of an undefined relationship was valid, making OP’s reaction the source of the current conflict.

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