I must have been off the boards for too long because I think I've just had to catch up on over 12 pages of your thread!
Lots of progress with BF, and the Piscean angle too. So exciting! I wish I had good advice, but I'm not sure I have anything to add to what everyone else has already said. IMHO, him needing space on the drive up is a good sign. He's obviously thinking about his situation and when he's alone he can really look at what's going on in his own head without distraction. So I hope he makes some progress on that tonight. Also they do tend to withdraw a little after those big emotional discussions. Remember how my H was last year- every time he opened up to me he'd then withdraw for a while to think about things....
Have a great weekend, and I hope the trains aren't too bad today.