Welcome to SR, I'm glad you joined us.
It isn't going to be easy for either one of you to stay off the drugs and also try to repair the damage of the past at the same time, but if you both want it bad enough it can be done.
NA meetings come to mind, it sounds like they might help you both. You don't say how long you have been clean, but if you are secure in your non-using then maybe Naranon would help you deal with your issues while NA might help him with his.
Others will be along with support and to share what worked for them. In the meantime take a good read around and know you are among friends here.
Hugs