He probably does have guilt but it's awfully buried. I'm not sure you can declare he is "over you" but he may be awfully, awfully detached.
He is not the one that gets to decide if the two of you will be friends or not - that is up to you.
If your H kept his feelings hidden for a long, long time he might be on a "natural high" of relief that *something* is out in the open. Eventually (and you may never know a thing about it) the "high" feeling will be gone and he will have to deal with things in his own mind. It might be 10 or 15 yrs from now but I tend to think people that leave marriages have to process (even if in their own way) the aftermath of that somehow.
Do what is best for you - if going dark allows you to heal then do it. Take care of you.
