Did you read the posts on my thread from earlier in December? My H was having much the same reaction to my DBing - he said at one point that it seemed that I was looking forward to his leaving.
I think I got sucked in a little bit more than I should have. Try to validate feelings and ask questions, not sharing much about your own thoughts and feelings if you can.
Continue to act happy and strong. If he indicates that there's any possibility of his wanting to get back together, don't react much. If you do, he'll shoot back into the tunnel - you are far from being where you want to be.
I hate it when people tell me stuff like this, so if you're annoyed with me at the moment, I totally understand.
