Opinions?

I have a young american friend who IM's me a lot. I've spoken to him a couple of times on the phone, and loads on IM. We have exchanged photos. To say the boi is mentally unstable is putting it mildly, he's convinced that I should be his girlfriend, despite the fact he's 16 and lives thousands of miles away. Anyway, we had a bit of a spat the other night and I signed off. When I signed back on I found a suicide note email. Later that day, someone signed on under his name. I thought I'd called his bluff but the person talking to me used totally different sentence structures and manerisms. She said she was his mum, and he was in hospital having tried to commit suicide. We had a long talk about him, and she evntually signed off. He IM'd me this morning having just got out.

Anyway, I'm relating this for two reasons, one, it was an extremely stressful event that deserves to be written down, at least to get it out of my head. The other reason is that I need some advice. What do I do now?? Do I believe the boi? Do I totally ignore him because he's mad or carry on trying to be his friend because I do care about him...
*Sigh* I always get the weirdos...
Hehe, no offence everyone! ;-P