Welcome to SR, I'm glad you joined us here.
I'm sorry he is going through this and hope he finds his way to a better path.
If you are going through your own emotional issues right now with divorce and changes in your own life, maybe now would be a good time for you to do some healing and regain your balance before involving yourself in a life of addiction.
Whatever you choose, we are walking beside you here and I hope you make yourself comfortable, take a read around, and know that you are among friends here who understand.
Hugs