How can I get him out of my mind?

There is this guy that I have known since I was 17. He was the first guy I ever slept with, the first guy to dump me, the first guy to tell me they were in love with me and the first guy to break my heart. The last time I talk to him he said that he loved me. I didn't say it back right away, but when I finely did he said he could no longer talk to me anymore because he realize he can't get close to someone.

Which made me very mad because he text me twice saying he hope I understand. The part that really tick me off was when I did said it, he blocked me from facebook, then a week later told me we can't talk. I also believe he started to date his ex girlfriend soon after that because the last time something like this happen he started to date her. It's not the first time he treated me like crap. I'm not going into the history of everything that happen between us. That will take forever to write out. But now that I'm not mad, I miss him a lot. Which now just makes me depressed with everything that happen between us.

Any idea how I can get him out of my mind?