Ye you can’t give up if your mates are dealers lol unless you shut them off.
You asked when do you give up being supportive? I think he has just given you your answer.. That he can’t play happy families because you want him tea total.
So he obviously doesn’t want to quit, you can’t make him to quit.
So the only options you have, stay with him and accept it, untill he hits his rock bottom and is prepared to quit. You just go do your thing have fun with your friends and child and leave him to his own devices.
Or just leave and move on with your own life. That’s the only way I can see it.
What are your thoughts on what he said about not playing happy families.