Mimi, I'm sure he knows he's the reason the marriage exploded ... I wouldn't sit around trying to get him to admit it, but he does know it.
I am in the same boat, but haven't left the house yet. I filed for divorce last August. My lawyer told me if I'm not being abused, there's no particular urgency about my moving out of the house, so I"m sleeping in my daughter's old bedroom. My emotions are so mixed up, I made new rules for myself: whatever I'm feeling in this exact moment, that is the way I need to feel in order for me to eventually heal. So nobody gets to tell me I'm too bitter, or too angry, or too depressed, or whatever. Nobody gets to tell me I need to learn to forgive. And, if I start to feel compassion for my STBX, or I start to miss our old relationship -- nobody gets to deny me that, either. I get forgiven for wanting him dead, and if one moment later I feel compassion for him I get forgiven for that, too.
I'm barely managing day by day, and I have found I get irritable and snappy with people I should have a little more patience with.