He may need to live by himself or even with OW for reality to bite him where he deserves it. The more time he spends with OW the quicker he will realize that everyone has their faults. I wish my H's OW wasn't 8 time zones away because I honestly believe it is dragging their A out.
Also, you will still have chances to DB because of your son, and also hopefully because of his D. Try and stay focused on the positives - if you are not living together, it will be much easier to detach. And you will have more space to vent w/o having to worry when he's going to walk in the door.
As for feeling like things are getting worse, in respect to your H, they are. You feel dragged down too because you are not detached. HE has to hit bottom and reality has to smack him upside the head. You need to lovingly detach from some of his drama and let him realize what he is doing to himself and your son and you.
(((hugs)))
Michelle - Proud DR Rockette S: 28JUL07, D'd: 29OCT09 http://tinyurl.com/27j9qo2