How to move on?

I had a friend that I loved more than anything, we were so close and I thought we always would be.. but, I moved away and he told me that we would stay in contact and then just stopped talking to me.

We were bestfriends for 6 years, and he just cut me off and never even said why.

It really hurts and I've tried talking to him many times but he just doesn't even read them.

I have traumatic dreams and it makes me cry a lot.. and its been this way for 2 years.

I just can't get closure. :( any advice? This is killing me.