The thing that was different between my hundreds (literally) of relapses and my final quit of close to five years ago was that I did not rely on willpower alone. I worked out what it was I needed to do to take away the evening cravings. Maybe it was a bit like Dee in as much as I could sense approaching death that drove me to think my situation through to a successful conclusion.
I'm an alcoholic and still have very occasional drinking thoughts - I guess I always will but after the depths I plumbed I know there is no moderation for me so I'm done with it.