I agree...the sooner he screws up the friends the better, but that is totally out of your control.
The whole situation stinks, doesn't it?
The prospect of losing everything you've worked for and planned?
Do whatever you can to protect your self.
One thing we can promise you is that alcoholism/addiction is a progressive disease and it always gets worse.
There's only one cure and we don't get to have any say in that.