TIg, I think you've established some clear boundaries for yourself.
One suggestion about your boys & not sharing their struggles w your H. I think you should share these w him. NOt to throw their struggles in his face but b/c he should be aware and he might in turn share more w you regarding them when they are w him.
I agree he should figure out how to handle them on his own.
Less contact will help you detach, I believe.
Try not to lose any more weight--your boys need you to first take care of you to take care of them. (I learned this the hard way as I lost a quick 17 lbs & was already in my weight range when I started).
Take care!
M- 18 T-21 S-14,11 & 10 BD 6-18-2012 (OW-EA) H moved out 11-3-2012 10-5-13 Me- I want a divorce. I want to move on w my life. 11-25-13 Jointly filed.