Is there any hope for my EX wife and i?

I'm still deeply in love with my EX wife Stacy. We dated all through high school and in fact were king and queen of our senior prom. We got married when were 18 and later that year she gave birth to our daughter Bethany. We got divorced 3 years ago because Stacy told me my drinking was out of control and she was tired of watching me drink my life away. Bethany lives with Stacy and i visit her on the weekends. 2 days ago was Bethany's 6 birthday and i missed it because i was so hungover i forgot about it. I felt horrible Stacy called me furious letting me know she was crying and felt lied to after i promised i her i would be there. Stacy told me i have already lost her and if i don't get help i will lose my daughter too. Bethany is my world i love her more than anything. I want Stacy back she is my one and only true love i don't want to be with anyone else. I'm not sure about AA i had friends who attended saying it was a waste of time and they are too judgmental. Is there any chance i can win back her love?