I agree with Maven. Unfortunately, no matter how much you care (and it's so obvious that you care a lot), there's nothing you can do but be his friend. A person in your friend's situation needs to get help for themselves. They have to reach a point where they acknowledge their problems and are willing to fight and do whatever they can to get better. I think it's wonderful that you're trying to help him, but he sounds like he's feeling rather defeated and not willing to accept your help. I hope he reaches a point where he's ready to reach out for help. In the meantime, I'm sure your friendship is a comfort to him.