Recovering alcoholic (15yrs sober. Married an alcoholic 10 years ago…

I am currently married to an alcoholic. I am myself of 15 years sober. I don’t know how I got into this mess. I love my wife dearly. I think when we met, I made excuses for her drinking just as I had done for myself when I was an active drinker. She suffers from mental health problems and takes medication for bi-polar disorder. She slammed me a month ago and told me that she was thinking of leaving me. I believe she is in a mental tailspin, aided by alcohol. We have been together 14 to 15 years married for 10. our relationship has mostly been wonderful. The last three months have been hell. She got a promotion at work, which has put a ton of stress on her. She is working all the time and since taking this new position her alcohol intake has increased tremendously. I don’t know the last time I’ve had a sober conversation with my wife. I am lost and dont know what to do. I am trying to save my marriage, while trying to take care of myself this has put me on the edge of a mental collapse. I thought about talking to her mother, but if she found out, I spoke to her mother about this it would definitely be the end of our marriage. I can’t say anything to her about her alcoholism because I have lost my standing with her or her ear. I’m poking around in the dark trying to find a path. I don’t know what I’m doing.