some people have a switch that gets flipped to "friend," and then they does not understand what all the fuss is about when people (like their spouses) complain.
I don't get this either--it's a bit hard to swallow the "friend" thing when it was used as a cover-up for so long. I don't harbor vengeful feelings towards her (it was definitely a two-person affair), but neither do I have a desire to have anything to do with her. Maybe it's just a way for H to make it all pretty in his head.