Oh Alison, have a whole bunch of hugs, it sounds like you've had a rollercoaster few days.
It sounds like he was offering you...something. But that it was all too much pressure for him. That's understandable I think, to go from living separately to being expected to come back to participate 100% in family life was too much for him to handle. And maybe he was as frightened as you that doing that would mean going back to your old broken marriage.

You've been very impulsive, and I empathise so much with your frustration. You want to GET ON WITH YOUR LIFE, preferably with him in it. I feel that too. However, I don't think impulsiveness is ever rewarded in this process. Then again, things dragging out slowly and painfully also might not be rewarded, and sometimes action is just the only thing you can bear to do.

I hope you're ok. I think you've done the right thing to let him feel the pain of being properly separated instead of just when he fancies. I should maybe take my own advice here...Take care of yourself xx