I just worry he is going to "crash" and there will be no one there to help him.
This may very well be. But this is how it needs to happen. He needs to "crash" and he needs to "fix" himself, without help from anyone else. Sorry.
It is so hard to watch them knowing that you could possibly help but also knowing they don't want your help. It's like a drug addict. You can force them to go rehab and talk to them about it until you are blue in the face, but they won't take any of it seriously until THEY DECIDE they need to quit.
