I miss my best friend.

I haven't talked to him in months. We used to date for 5 years... Hes the o ly person I felt completly ok with... Im scared he won't ever talk to me again. But I have to refuse to believe he still doesn't want anything to do with me. He added me on facebook back in october, but has blocked me on pretty much everything else since he got a new girlfriend. I need serious advice and help.