Sorry my reply played up as our internet is rubbish!
I don’t know what else to suggest. If he wants to get clean being around people on it won’t help. And he won’t manage it on his own. It will be hard enough with the help of cauk.
I hope you can find a way through this but if he won’t choose to get better then you might have to consider whether the life of chaos is for you.
It’s a horrible feeling and i would not wish this pain on anyone.