Sorry you are in such a rough situation. I don't have much advice, but I agree try to go to Al Anon, they will help you tremendously. You're struggling with a lot, but the drinking combined with suicide / self destruction is so much when added to the D / S situation. The folks at Al Anon will really understand.
Me: 40 W: 40 22 Years together, 14 Married D8 + D7 Aug 2012 - Separated Sep / Oct - Back Together May 2014 - WAW / Divorce Bomb / Separation Jun/Jul - Suspected Other man / Confirmed Now - WAW moving out