My husband went into rehab recently and it caused a lot of emotions in me too. Im not sure how that changes if you are divorced, do you have a relationship still, children? If so then I think what you can do for him is to be there in that capacity if he asks, maybe participate in his rehab at some point if it would be helpful to him. Might help you too. I have been reading a lot about addiction, learning as much as I can, its for me mostly, and to be able to understand better what he is going through, what the future holds. I have a whole list of books that Im working through.