Co-parenting with a high functioning alcoholic.

I am so exhausted. I have a daughter who’s 17 and has suffered over half her life with her father who battles addiction. He was the PERFECT father up until she was 9. And then-everything went down hill from there.I’ll spare the details of the long story of emotional, physical abuse he put her through (I was barely ever the punching bag it seemed, another thing I always steem off about). We got divorced. For the last 1.5 years, our co-parenting can only be described as: **the lows are low and the highs are high”.And my god, are we at a low right now.My ex husband is on another bender again, which means he automatically is making his daughters life a living hell.He decided to tell our daughter that her CFD (chronic fatigue disorder) and anxiety disorder is fake and because she’s a lazy and weak minded person. And that all her problems would go away if she worked out and lost some weight (my daughter is 5’9, and 120 pounds. Try again.).It’s sad to say she told me she’s “use to it now” so it doesn’t affect as much.He then decides to call me and start telling me how everything is my fault and that our daughter is a p*ssy, and then starts ranting about how her boyfriend should be charged with statutory rape (they’re a year apart, 17 and 18) and he’s going to go to his house on prom night and harm him.Why do I always get dragged into this. I’m 55 years old. I deserve to not get harassed by my ex husband. I don’t even know how to help my daughter anymore.He affects her so much. If they’re fighting, she’s anxious and gets more intense with attitude than normal. Which means I get mad and the domino affect happens.He literally made an event she hasn’t been able to contain her excitement about (prom) something she is now dreading because she knows her dad will show up drunk.Ugh. Any tips on how to help this? It seems like every month he goes on another bender and makes my daughter more and more anxious. Again, just like with our coparenting. When he’s sober they get along great. But when he uses, it’s terrible. via /r/Parenting https://ift.tt/2H3mcU6