It kind of sounds like my H at the beginning of our separation. He was all over the place. Keeps saying he wants a divorce, is convinced it's the best thing for him, and is also taken aback at the potential financial settlement. He hadn't expected to have to give over so much. Shows moments of love and then coldness - mostly via email. In person, he's been nuetral.
It's like they are having a battle between their heads and their hearts. They still love us, but their left brain has gotten in the way. So, they are all confused.
It was driving me nuts, so I decided to just get on with my life the best way without him, while he figures himself out. I remain pleasant and positive everytime we email, and I do miss him terribly still (3 months now) but what else to do?