So this happens to me a lot it seems, generally from younger women. They are obviously interested, enjoy talking, unintentional IOIs, etc. But the second I hesitate escalating they pull some manipulative bullshit with another guy. Like they show up at a meetup with a guy they obviously don't like, or they look at me and make sure I'm watching then flirt with said guy, you get the picture. I assume I'm not the only one that gets this.

Anyways the problem is that it's a complete turn-off for me. I just lose all interest, it stops being fun for me and I end up resenting the girl for not just enjoying eachother's presence.

So my question is, what methods do you use to rationalize this, prevent this, or disarm these situations?

I'm at a point with this one girl where I hate the guy she's flirting with so much I just want to sleep with her to piss him off. His game is terrible, complete one-itis, pathetic AFC. And then I'd take her out with the trash.