I just can't get over him. Please help.?

It's summer now and there has been this guy that I have been into since september 2010, and when we first started talking (as friends) it was sexual and ever since then it was always sexual, and I had no problem with it. But then in december 2010 I found out he was talking to this girl, and he was in love with her, while he was trying to mess around with me, then I got mad and I didn't talk to him, then I would forgive him, and that went on until mid March 2011 & we finally messed around (I gave him a bl0w j0b) & after that we were really really good friends, and then after about a month later he told me that he was ready to settle down with someone, but it wasn't me, so that hurt me & I was devastated because I felt a connection to him, after doing that stuff with him, and then we made up, and then stopped talking, and ever since about mid may we haven't talked and he deleted me off facebook and I didn't even do anything to him, and now he's always in my head and I can't get him out. Every song I hear or car I see reminds me of him. I'm literally loosing it and I don't know what to do. Help please :/ and he is still talking to that girl, and I think there going out, but I'm not sure, and I don't get it, she is so ugly. That just irritates the living sh*t out of me.