<human>: Condense the text into a few key points

We met in sophomore year of high school, she was my first girlfriend, I wasn't her first boyfriend. half way through she had a thing where she thought she loved an ex, but then ended up not loving him? I don't really know, whatever it was I helped her move through it because I cared about her.

 Fast forward 6 more months and we have a huge fight, she gave me flak for talking to other people about arguments we have, when she'd been discussing how I was in bed and a whole host of other things with all of her friends. We take a break for a bit, nobody fucks anybody else, and I end up forgiving her and we get back together.

A year later I think everything is going great and then I find out she's cybering with her ex pretty much on the daily, and interestingly enough, she dumps me when I offer to talk stuff out to get through it. 

Now, 4 or so months later, she's dating this ex, and she wants my forgivness and for us to be friends. Problem is, I still care about her way too much, but also at the same time I fucking hate her for what she did. Being Bipolar type II doesn't help my life situation either, so i'm just kinda lost. Lately we talk from time to time, mostly it's her asking me to forgiver her, and me telling her to fuck off. I don't really know how long this can go on, I met a beautiful girl last week, I think she was honestly perfect, but I didn't get her number because I still had feelings for this ex.
<bot>: Cheating ex wants me to be at peace with her dating the guy she cheated on me with, for some reason I still love her, pls halp.