Big vent story of a particularly rough dating experience

This is long winded and hopefully it will be comprehensible.

I matched with this girl on Hinge (mind you- I have my preferences clearly laid out on my profile that I’m looking for monogamy and that I take a little while to warm up to people physically. I don’t really do hookups). So, we hit it off quickly and she almost immediately starts getting into romantic/dirty talk. It was a new, exciting energy for me so I ask her on a date shortly after.

Over the course of a few weeks, we go on a few more dates, and eventually she asks to come over to my place. Now, I tell her beforehand that there’s a strong likelihood that I won’t be comfortable having sex. She said that it was okay and that she genuinely wanted to hang out. She comes over, we watch a goofy horror movie, and it seemed like a great time.

However, as she’s leaving I ask her if she would like a kiss. She says “oh, so now you want to kiss me?” and we kiss. But her comment threw me for a loop and made me rethink the whole night and whether or not I disappointed her somehow. Well, over the next few weeks she starts drifting away until one day she basically tells me she just got fucked by some other dude.

I’m totally taken aback because- again- I made it very clear that I wanted a monogamous relationship, and now she openly admits that she’s sleeping around while seeing me as if it’s no big deal. When I confronted her about it, she tried to shift the blame on ME because I supposedly never asked her what she wanted out of a relationship.

First off: I think she should have understood that I expected her to want a monogamous relationship since I stated I wanted one on my profile. (And for the record: her profile didn’t state what she was looking for so I couldn’t have known that she was going to pull this on me). Second off: I think it’s basic decency to not tell people about how you’re being bent over by some other dude when they’ve previously said THEY WANT MONOGAMY.

The funniest part is that when I could tell she was getting disinterested in me I confronted her about it, and she tried to claim that it was ME who was losing interest in her. I just hate the current dating scene so much and how people refuse to take accountability.

Anyway, I’m still cut up over it months later because we really connected so well during those first few dates and we shared so much with each other. We even shared explicit photos which is something I don’t typically do early on. (Yeah, I shouldn’t going forward).

The whole experience left me in a super sour mood. It feels like people just say and do whatever they please and don’t consider how it might affect others. I guess that’s about it. Hope you guys are having better luck than me.

EDIT: I did tell her early on that I wasn’t comfortable with her being in contact with her exes who still had feelings for her because I’m strictly monogamous, and she told me it was okay because she never intended on doing anything with them.

So for everybody who’s saying I didn’t communicate clearly I certainly did and she knew full well what I was looking for in a relationship. She had an ample opportunity in that moment to tell me she wasn’t the monogamous type and she didn’t. I would say that’s lying by omission.