BeeBee I can see that, too.
In my personal experience, men truly see their other half as their lover, partner in crime, companion, and BEST friend.
All the men I have been with, worked (and still do) in male-dominated professions. They are very athletic and go out with other males for social get-together's etc. Have their fathers and brothers, and yet I was something like their best friend. And my ex-husband was also my best friend.
So, when the marriage ended, I also grieved the partial loss of that tight friendship, and now we are not even close friends anymore, because he is re-married and I think that is totally okay and right for him and his wife.
Now, we are only co-parents. And I even can see it as something very positive for my daughter to learn from the way her father treats his wife and which importance he gives his wife and his daughter, but not me anymore, as I am NOT the most important person in his life anymore.
And as paradox as this might sound, I totally admire him for that.