I am in almost the exact same boat. Best advise that I can give is to detach and to work on becoming a better you right now. Make her SEE the positive changes...because at this point she wont believe you by word of mouth. Once she sees that, maybe her WAS resolve will weaken.
I feel for you...this is the hardest thing in the world and it will feel like a marathon at a snails pace. But, just try to look at the positives.
