That was me Thissameearth I still stand by it. If he gets in touch after Christmas, then please be extremely frank about your expectations from him. You have every right to ask he treats you with respect, consideration and with good bloody manners. Basically, how you would treat him.
Christ, just have a frank discussion him about what he wants, where he sees you guys going, and stop this mindfucking craziness of remote analysis. The truth is none of us knows what the fuck he wants, but if you ask him, you might! And that's all that matters. He owes you that. He hurt you terribly before, you have a right to put some markers out, give him the skinny on what you are ok with, and what will make you bail. And then, darling, if he says he wants what you want well then, fuck it, go for it.
We only live once, everyone deserves a second chance and, cards on the table, I gave DH a second chance in similar circumstances. He just wasn't ready for what I was ready for the first time - but I didn't sugar coat it, he was under no illusions that he had to go all in if he wanted me back and to keep me. And he knew I meant every word of it. I knew and sensed the difference straight away - it was the step change from being someone he fancied and hung out with to being the person he cherished above all others.