It does sound like things are winding down with OW, but you still have to take care of yourself and not get to excited. It sounds like what started happening with my H and OW just before she told him they couldnt go on with the affair any longer....not sure if its the same sitch with your H and OW, but calls got less, texts got less and less and he started spending more time with me. But of course I got the same, "Im not in love with you and dont think things will work, so dont get your hopes up that things are good with us".
Sounds like you should just keep doing what you are doing and see what happens. He is confused right now and really doesnt know his own future yet either...as hard as it is to believe, they are in just as much pain and confusion as we are even though they dont show it in the same way....