It’s hard to accept that you cannot fix another person.
This is especially true when someone we love is an alcoholic/addict. There is usually an underlying issue and the alcohol is part of the escape. These individuals tend to create outside ways of gaining a sense of control. They tend to repeat patterns that are unhealthy. Individuals that are nearing 50 yet still interacting with the maturity level of an eighteen year old. That is where they are stuck and are very resistant to changing and actually growing.
It took me a while to understand this myself. I wanted what you wanted, I hear you. It’s not your fault that you can’t fix her.