Oddly enough...when I was still suffering through the difficult times of my M I was the one drinking. A bottle of wine daily. It took my IC and my primary care DR to point out that I was heading towards a real problem in addition to being on the verge of a breakdown. Its very easy to fall into when you are in so much pain. At least your aware that you have been indulging too much. Thats the first step in avoiding the problem. Keep your chin up. Have the conversation today. Try and do your best to keep your emotions in check (i now easier said than done). Sounds like this is your chance to get all of your concerns out on the table and make some choices about how to proceed. You cannot keep feeling like you are in limbo or that you are being a doormat. Sounds like its time to set some boundaries about what you will and will not accept. Be prepared for separation discussion and try to keep a level detached head...and don't forget your best tool, validation.
(((Hugs))) good luck today.
Me: 30 EX-H: 37 DD: 5 Separated 6/07. MC for months, EX-H quit MC. Divorce Final 8/14/08. Trying to move on with new life.