I know this is a lot to read, but I have an ex boyfriend problem. Please and thank you!?

I don't normally do this, and I strongly need other's opinions because I am tired of hearing the same thing. My ex boyfriend and I well broke up actually on February 17, 2009, and ever since then, we have been on TERRIBLE terms. For some reason, we can NOT get along, and I just DO NOT get why. Anyways, he ended up sleeping with one of my close friends 4 TIMES, and she told me everytime herself. She would say what a good man he was in bed and that I was nothing but a mercy to him, and she would drunk dial me and tell me that they used handcuffs. It was really hurtful, but mine and my mutual ex boyfriend's friends she was nothing to him but an easy good time. He KNOWS how hurt I am, but he NEVER makes the effort to be on my good side, he NEVER says hi to me, I put the effort ALL THE TIME. I mean, It's been COUNTLESS times that I've tried to be civil with him, and he is SO rude EVERYTIME. Last time, I tried, he BLEW UP in my face accusing me of trying to interfere with his life and that I was pathetic and stupid and that he forgot I even existed. But there is a quote that says, "people that have pushed on have achieved something in places where there was no hope at all." I am a genuinely good person and I am GENUINELY trying. I just tried to be civil again last night by IMing him and I SAID "I apologize for anything I said wrong, but I am nice, apart from my terrible taste in words, I am nice. and I am really trying, James, I really am. Please, James. It would be good if we could be friends." He completely ignored the message and signed off on me. I literally lost a huge chunk of my pride and self respect by doing it, but I feel like life is too short to grudges for anyone. I just don't understand why he's doing this. I am literally going to have "I am trying" imprinted on my forehead for the rest of my life. It's just so hard for me to see him be nice to EVERYONE except me. It just hurts so bad. I promise you guys, I am a nice girl. I care about everyone. It's just my nature. I am also saying, I'm not trying to be crazy freak ex, but he is friends with the ex before me, and I just don't understand why me and him can not get along. I have definitely moved on, but at the same time, I think it's great if me and him could be okay with each other. I don't find anything wrong with that. Also, me and him broke up because it was mutual. It wasn't working out, so it wasn't working out. i am also not trying to be a psycho freak, but im the kind of person who likes to patch things up with people. Anyways, this is just affecting me being happy everyday. I know it shouldn't, but it just is. Thank you for taking time to read this. I need all the advice I can get.