At least he is trying. When you say you want it to be over, he comes rushing in and tries to still be in your life. To me, that is good progress. He still has a lot of issues, but he still wants to be with you, I think. He says he doesn't, but besides OW3, his actions are saying a completely different story. That is good for you!
I say keep being dark and sticking to your four things. It is very important because he does "need" you and does find you attractive, but you have to stick to it so he learns as his brain heals that he has to do more. Keep detaching and just moving on with life. Make him come to you, and possibly use how busy you are to say "no" to any suggestion he has. I like that you don't respond to everything.
Although the light is dim, I think there is still hope in this situation so don't file or anything yet, but make sure you are distancing yourself and preparing yourself in case the worst does happen.
Me29 S3 H left 4/1/09 I file 8/2/10 Divorce final 5/17/11 1st http://www.tinyurl.com/25lhu52 2nd http://www.tinyurl.com/2c35ueg 3rd http://www.tinyurl.com/322yk89