Sue, oh man. I feel for you. I would let the rest of this week go on and just try to relax, focus on leaving this weekend. And you might remember, my H still to this day goes back to 'we are friends' when trying to justify the relationship. Its pathetic actually. Finally, this last talk we had, he admitted "We were friends", instead of 'are', and realizes it can't go back to that, no matter how much he misses it. I told him he wouldn't have had to miss anything if they hadn't gotten carried away.
I am so sorry. I know the stage you are in and I don't envy you. Please try to take your anger (there will be a lot) and turn it into a crazy game of tag with your D3. It helps, even if it feels forced. Time passes no matter what you do, may as well spend it with D3, and 'as if' your H, polite but pulled back a bit.