Well ... it looks like you have some positives to hang your hat on, and at least you are quick to realize the detach and no expectations left your side for a moment .. that's natural as you were just given some hope, continue to detach, he is pursuing you now, the fact he doesn't want to show his face shows he is actually feeling some guilt and shame for his actions ... be careful not to punish him, remember .. be the lighthouse, the rock, allow him to come to you without scaring the squirrel off.
I think you have handled this very well .. and that mediation session went about as good as you could have hoped for if not better, you have a mediator who might be aware D is not the answer for you both and may be able to give you .. more importantly him the tools to start rebuilding, its like a sneak attack MC where Gritty may feel a little more at ease and not threatened nor feel forced. This is all a good thing .... congrats.
