It looks like he only wants to look forward, and not look back. Maybe it is all the guilt he feels. And I wonder if he was always this way about apologizing, some men seem to feel less than manly if they have to say I'm sorry. Maybe if you two are one day living together again, he will gradually start to open up to you with these feelings. Yall probably have to almost get to know each other again. And he is now saying "we"; that's a good thing, isn't it?
L