So glad that you are feeling better. It's easier to go thru the tuff stuff when we aren't feeling so sad. Taking one day at a time is the best plan. This year will be over before you know it.
I was just thinking, what do you think your H would do if after the Holidays you give him a choice? i.e. "her, or me?" I know at one time you mentioned that he would get angry if you did that, but what would happen after the anger? Has he taken any action about getting his own place? What do you think he would do if you cut him off, and he had to stay with her and kids for what he thought was it? If he had to live that life for a bit, and thought you were gone, would that shake him up enought to help him with the "decision?" Sometimes a guy has to "loose everything" (us too) to realize what they have. Just wondering.
Most of us are about as happy as we make up our minds to be.