One thing that helped me through all of this was to realize that when the addict starts quacking like that it was a way for them to see if they could get back "in". If things were soooo good they wouldnt be talking about how GOOD life is and yada yada they would just be living a good life.
I also told myself, if things were so GOOD he wouldnt be using drugs. Usually when we leave its because for them drugs are no longer fun they have turned into miserable people. Addicts can move, change jobs, change SO's, and whatever else they change externally but the sad fact is that they dont change themselves and so things wont ever be BETTER or GOOD.