I think you were doing ok, up until the "why don't you file?" bit. He isn't ready to forgive himself. He may never be. And until he forgives himself, I don't think he can accept your forgiveness.
You said what you needed to say, and maybe a bit more, so let it drop. I'm not at all convinced that he is going to file as a result of this. I'm not sure it was a great plan, but the questions you asked him about the OW may get him thinking a bit, too.
Now you really need to take care of you. I'm feeling a real need from mindless diversion, from you, and from Michelle. If you can't go out somewhere, maybe rent a really silly movie, one you would never watch when you are sane. One that a 13 year old would love, but watch it without him. I was telling Michelle I wanted to take her to Kung Fu Panda (of course, I am too far away), so I think I'd make the same offer to you (again, I'm too far away). So, instead, maybe a juvenile movie at home, nothing with any possible romance in it!
Hard to imagine he didn't notice the girls, perhaps he is dead?
