I agree with BlueInanna - I don't really think this belongs in this part of the forum.

Even though you don't want to, you need to stop forcing yourself on him. He's not a child. You can't fix him. The most you can do is wait things out. Less than a week? Is NOT waiting things out.

Personally - I don't have substance abuse issues and I do not have anger issues. I do get irritable sometimes, but nothing too extreme. And having someone consistently invading my space with rather silly messages when I was in a depression and had made it clear that I wanted to be left alone? Yeah, that would actually make me angry too.

I get that you are trying to be a good friend. But you're just putting on pressure and sorta treating him like a kid. Leave him alone for a while. Approach him again in like a month maybe. Maybe wait until December so that you're sure.