Most Helpful Guy
As I see it, you should not interact at all with him. Instead, ask someone close to him to take care of him. And give him time before trying to be friends.
Most Helpful Girl
Leave it alone, it's none of your business. He's doing that because he has serious issues and he needs professional help. Don't try to force him. He needs to take responsibility for his mess and he needs to just learn to accept that life isn't all about him but about other people who need him.