Hi floridagirl,
I don't want to sound like a buzz-killer

but there is a chance that he might return to his wife. wut?
Yes, in alot of situations the mm/lover takes a holiday from his marriage by doing just what your guy is doing, leaving his marriage, then dragging his feet..then breaking a heart.
I am concerned that you gave him everything and asked for nothing. You want marriage, I don't blame you...But he needed to be divorced before you handed him the keys to the kingdom..No judgement here, let's review.
He is living with you now and still not divorced. Right now you must let him know what you expect from your relationship...If he doesn't divorce within a time limit...work out one together and stick to it, then it would be in your best interest to not live with him anymore...
This will be difficult but you gotta do it. His inertia is eating away at your self-esteem..plug the leak now.
Good luck with this