Wow, that's pretty sad. Has he ever been in touch with a psychologist? Because he's not going to take that step himself. It's the hardest one. From there on out, it'll only get easier.
Funny thing is, once you get these assignments to do from your psychologist, you're afraid not to do them, if you know what I mean, in fear of making him/her angry. You really have no choice from there on out. And you'll be glad you don't in the end.
I remember when I find out I had it. I kept it to myself for ages. On one day, though, when my father was out, I snuck behind his PC, searched up "Sociale Fobie" (=Social Anxiety Disorder) on wikipedia and left that page standing on his screen. He got the hint and got me to the docter etc.
The guy might've given all kinds of hints that he wants help. They're usually so subtle, that you won't notice them. The thinking process is rather skewed. You'd wish someone would notice, but you don't want to speak up, if you know what I mean. You can't speak up, actually.
Erm, weed, yes, legalize it.