Ok so first up a little background information about my situation.

Me and this girl went to school together when we first got to know each other my life was in shampels, I had just broken up with my ex and was overall in a pretty rough spot, physically, mentally and financial. She was a girl who got everything from her parents, she was used to getting everything she would point at and she knew she could get pretty much any guy at school. Despite my shitty situation we hit it off quite well, we became friends and I made the move to become more than friends and got brutally denied once or twice.

Present day: 1 and a half year later, I have gotten my shit together and become a better version of my self. So this weekend she asked me to come to a concert with her, I said yes of course knowing I probably would regret it, at the concert there were so many hungry boys hitting on her and I foolishly tried to hit on her in vain.. After the concert we went to the club where we meet up with some friends, and of course guys hit on her at the club aswell.

This were the moment where I have gotten enough I got up left our table and joined some other friends I had at the club, 30 mins later she comes over and asks me why I left her and the other guys, I just looked at her and let the liquid courage talk, and I told her what a manipulative bitch she were and that she found pleasure in having thirsty guys follow her around, I told her that I wanted none of that, and if she wanted such a night out it would be without me. And suddenly she became so clingy and wouldn't let go of me, 1 hour later we're at her place shagging all night, the day after while we lay there in her bed she starts talking about that she is in the process of getting back with her ex, and I pretty much just said 'good for you guys' and got up and left her place not wanting to be another pawn in her game. And know she has been texting me ever since

Sorry for my English it is not my first language as I live in Denmark.

Tldr: a girl who rejected me a year ago invites me to a concert, i left her and her tail of thirsty guys, where as she seeks me out and asks me why I left, i grew some balls and I told her the truth about what a manipulative bitch she where and we ended up doing it all night.