Reconciliation or Retrograde?

I talked with my friend again today. I reiterated how sorry I was and how I needed to know the reason behind his recent behaviour. He just told me to delete him and leave him alone again.
Now I'm not pretending I'm the total victim who did nothing wrong. I think I have pieced together enough things that I realise my mistakes. He re-added me to Facebook but wouldnt talk to me, so I deleted him. That was a stupid fit of what I'm not sure, but not the right thing to do I know. I had a snide comment on Facebook as well, that was really just about the frustration I was feeling, but he called it whiny, which I can see how it can be seen that way, and said I was trying to play the victim and solicit pity. I told him I don't want pity, or reasons from him about how it's his fault. I just want to fix it. He said he didn't. I left the convo with how I couldn't make him like me. The mutual friend I had contacted to help me got back to me today. He ssured me that our friend gets funny like this, and that it once took him 6 months to get him to talk again. While I don't like the idea of going 6 months without talking, at least it holds out hope of a solution that doesn't end with me cutting and running. B/c as I put it, I would rather die then do that. I refuse to abandon people no matter how much they may want me to. It's not some igher ideal, I just can't physically allow myself to do that. I would make a terrible doctor when it came time to yank the plug on someone. I couldn't do it.
With my friend, I know that he has had a very hard life. I mean, my childhood wasn't easy by any stretch of the imagination, but his was something else entirely. I got rescued from mine. In a way, he really didn't. It made him tough, but also isolationist. He doesn't tolerate a lot of things that would seem trivial to most people. And he relies on alcohol, even more since my BF's death. They were best friends, and I think that he still harbours guilt about what happened, still blames himself for it. Occasionally he will mention while drunk that I should hate him, and want him gone, and all that. But I certainly don't. I need him in my life. In a way he's filled the void in my life. I love the guy, like I've loved very few people in my life.
That's why I refuse to give up, why I refuse to walk away. To me, going through hell and back would be worth it for him. I just hope that it all works out.