One things is that you atleast realized that you needed some sort of help and have made the attempt to get it. As far as your husband not excepting you because he doesn't except the disease, for one thing I doubt that is true maybe after living wiht it he thought of what it was doing to him and more importantly what it was doing to your children. I hope that things get better for you but a couple of things are that you should if not already consider getting a counselor(even just some one to be a sounding board can help) and you should turn you focus to a more important person(s) than your ex(and except that is what he is) your twins. You should want to try to make them your focus and your own frame of mine your two top priorities. Always thinking about a relationship that isn't there will not help you or your kids at all.
I have a mother who is bipolar and I have memories of when her and my step dad got divorced she was devestated and for a little while her top focus was a non exsitant relationship, not herself or her children to a certain extent. She at one point got herself together for me and my sibilings and started to count herself as a prority. And after a few years found a very loving man, who she has now been in a 11 year relationship with. Has managed to raise a hell raiser who is now going to school to become a minister and in about 2 months she will be a grand mother, and has another kid doing better each day. So I hope this gives you a little hope for the future life you have to give to yoruself and your kids. So even if things seem bad at the moment try to remember everything happens for a reason. If my mother had stayed with a man who didn't except her with all her problems or atleast try to help fix/work with them through the tough times, she would have never been able to help herself and become a woman with so much to offer herself and others nor would she have found the man who has been with her even when she was at deaths door(literally). Many prayers are with you, I hope that things get better for you. Always remeber when you think it is at it worse god never gives some one more than they can handle. And every trial leads to a victory of some sorts. If you ever need a sounding board jsut write .take care of yourself