If he wants to change his life it is up to him to do it.
This realization often comes with a dear price. In my experience I had to go through alot of pain before I knew, that I knew, that I knew...that I cannot control other people, places or things.
It doesn't just apply to the addict or alcoholic but to all of my relationships and encounters in life.
Knowing this has taught me to let go of my expectations of others and focus on what I can do instead of what I cannot. It's my way to paraphrase the Serenity Prayer.
I'm so happy that you have experienced a breakthrough with letting go and letting God.