I can only think that that is what I was trying to do(buddy buddy) because, in my mind, the marriage was over and I was already trying to establish our after marriage relationship. I kept telling her that I wasn't fighting for our marriage anymore, but just being friendly to each other.
And then who knows where it could have led. But I AM fighting for our marriage still, even though she may not realize it. Hell, I don't think I realized it. I will keep trying until she initiates the D.
I think we also do that because it's simply easier. We're nice, good people, and it's easier to be someone's buddy than to come to the sad, awful realization that this person you married is no longer a friend of the marriage.