Thanks everyone. Your comments have been very enlightening.

I came from a family in which married vows were taken seriously (my parents have been married for 55 years), thus, I have never had to go through being a kid to divorced parents. I know that when my ex and I divorced, we made it a point to raise our daughter on the same page (we actually get along better now that we are not a couple - no arguing at all through the divorce and even now about 4 years of being apart).

I think he is coming around now. We spoke the other night and I think he realizes this is a very different dynamic.