<human>: Give me the gist of the text in a nutshell

The Lowdown: They were together for 1-1/2 years. She's a serial cheater who cheated on him and on all the past relationships she's been. He's the epitome of a "good guy" and tried to believe she'd change when he caught her cheating the first time. She kept going behind his back with other guys. He caught her and dumped her ass. They broke up 1-1/2 years ago.

Someone please knock some sense into me. I just want to let go of this anger and hatred since she's an ex and he broke up with her 1-1/2 years ago, and now he's with me. I just can't help but feel angry that she was such a huge bitch to the most amazing and nicest guy I know though, and I just want to hurt her, call her a whore, slap her, etc. My bf says he's completely over her, and has been for the past year, and it's only me who keeps thinking of her. This is really irrational of me, and I'd love for someone to talk some sense into me.

Perhaps part of it might be that my bf and I were close friends for about 1-1/2 years before we officially started dating 1 month ago, so now I don't see his ex as just an ex, but as someone who had him before me now that I'm his current gf.

I just want to find peace. I'm trying to let go of this anger and hatred. I'm trying to tell myself that she was a huge bitch and her loss is my very huge win, that karma's a bitch, that she's the one that has to live with herself, that my bf dumped her good, that her life is shittier after she let go of the most amazing guy she ever had or will have because bitches like her can't get good guys like my current bf.

Just please help me get rid of this anger.
<bot>: So consumed by anger and hatred for boyfriend's cheating ex of 1-1/2 years ago. How do I get over this shit?