I don't want to return to an intimate relationship with my ex-wife, but the intimacy we share in raising our kids is more important and deeper than any of our feelings of loss or anger. We have to get OVER our emotional divorce in order to get INTO healthy divorced parenting roles.
Live your life as you would like to see your kids living theirs. Show them the adults they can be, by demonstrating the best that you can be. Anything less is a miss. Parenting and co-parenting resources come and go, theories of parenting and how do recover from divorce will change from season to season, but this truth never changes.
I am sad sometimes that I no longer have a partner and cheerleader in navigating these difficult times. But that role/relationship ended several years before the marriage did. And now I have two fabulous kids and their mom.