To be honest he really does need to want to quit himself. Your right though.. it is the devil. Its such a sneaky drug, and it makes you cause arguments with your partner as an excuse to get it. Its a very clever drug and messes with your brain.
The problem is as well, the more money your earning the more you will tend to have, and the worse you will get. Its everywere now, its in every pub, people take it to work. Its easy to get dropped off aswell..
How much is he spending a week?