You need to just leave it be. I know it hurts but like everyone else is saying your life will be much better now without the drama. I was best friends with a girl for a few years and she was so flaky and blew me off so much for no reason. She accused me of trying to sleep with her boyfriend even though I had no history of doing so to anyone or showed any remote interest in him. The kicker was also how she said she wanted to dump him all the time, so I stopped talking to her and then she sent me this long text saying I was ugly and fat and to never talk to her again. She was also older than me. How mature. Then five or so months later, someone I worked with was friends with her and she apparently said she was very hurt, and wanted to be friends again if I apologized. FOR WHAT?

I also had a girl who I thought I was really close with move away and not tell me so she could get out of paying me back $100 for a concert we went to. Let's just say I've smartened up with the friend choices.