Tam, I think one of the really difficult things for you in this sitch, that most of us are not dealing with, is a S who keeps saying "don't worry, we're on track" or something like it! In a sense, I have it easier with a S who directly says "we're finished", I don't have the enormous emotional burden of that confusion like you do! My suggestion would be to just accept "We're on track" as meaning NOTHING. His actions say he is not commited at this point, I would accept that reality. Don't let him pull your cord with that garbage, it's too emotionally draining for you. How can it not be? Let it go in one ear and out the other (I know, hard to do!) or even tell him he doesn't need to say that anymore because you no longer need to hear it. I think dealing with living in limbo is critical to your moving on in your DBing and keeping yourself together. I hope this helps! No 2 X 4's today just pure understanding!
