I hope he comes around, I put my wife and son through the same thing, I was always too busy drinking or doing something I could do while drinking instead of doing things as a family.
Thankfully she stayed around when I basically ignored her and I still can't figure out why.
I wish I had a answer or solution for you because I know how I made my wife feel and it's probably how you feel right now.
Hang in there, if I quit I bet he can too.