opening eyes

I first posted wondering what to do when I experienced my first episode of severe depression from my boyfriend. It has left me so confused as to how/why he behaved the way he did. He had moved in with me, but basically ran away, which caught me completely off guard, when he paniced over a situation. I knew he was depressed and getting worse daily. I have not had any contact with him since except by my writing him a letter. (This happened the first of Aug.) From what I understand from a mutual friend he has been to a doctor and taking meds for about 2 weeks. Reading so many posts here from people who share similar expereinces has given me some hope that I might still here from him. Going from BEST friends to saying he can't talk to me, doesn't know what to say, and avoiding me hurts so bad. The person whom I have know before this would never done this. Friends try to tell me he is just cold hearted and doesn't care. My heart tells me different. Why though after my letters of support won't he "open back up" to me. I would do anything to support and help him and before this he knew that. I am going for counseling tomorrow to help me cope with this. It has put me into a deep depression because I miss him so much. Am I foolish to hope things might work out?