Please post this in the Naranon forum. I really think the relies you get there will be the most helpful.
Even though it is the same disease, each of us have different personalities and circumstances. I can't help you get into his mind any more than I can help you get into the mind of anyone else. It just doesn't work that way. A drug may be a drug may be a drug... but an addict is NOT an addict is an addict.
The healthiest thing for you is to focus on YOU. Take care of your needs and move on to a happy life.