Are you really confusing love here with codependency?. Why do you need to try and stop him and put you and the kids first; why are you putting him first. That scenario in which you succeed won't happen at all particularly at your instigation.
Also what effect is all this having on your child, these young people see and hear far more than us parents care to admit to ourselves. They are perceptive and pick up on all the vibes both spoken and unspoken here.
You pleading with him won't help you or he for that matter so I would save your breath. HE has to decide for his own self that he will not restart drinking again and for his own self.
You can only help yourself ultimately RedRanger, you cannot help him.
Re this comment you made about you:-
" What a great wife I must be that he wants to drink more than he wants to be with me".
This is really no reflection on you as a person. You are not responsible for his choices or the actions of another person. Its about him and his relationship with alcohol, its his primary relationship and has been throughout your own relationship with him. You and the kids come way down his priority list, even if you are all on it now which you are not. He grew up in a dysfunctional household where alcoholism heavily featured, the red flags were there early on.
He is not a fantastic dad either to his children, women in poor relationships often write that when they can think of nothing positive themselves to write about their man. You have certainly not described him as a "fantastic husband" in your own writings. What are your feelings when you look at him now?.
I do actually wonder if you and your kids come first because you are still expending your energies on someone who really does not want either your help or support. What you have tried to date has not worked.