The common theme for them is to break free, leave all of what they had behind. They, in their own way, believe that we will be right where they left us when the boarded the mother ship. Unfortunately, the world will not stand still for such things. Children grow up and we learn to move on the best we can. Unfortunately, the mlcer hasn't grown and has remained stuck in wonderland.
The words "let's be friends" only means that when they are open to clarity and want to connect w/you, it is on their terms and when they get that "fix" they then disappear again. The same applies to the children. It's only when they move further along the path do they begin to want some connection w/those the left behind...but the sweeping under the rug will not happen. Why? Because the children and spouses where is the same movie and know that nothing can change the past, except to own up to the mistakes and find a way to repair the damage. Many of them can't or won't do the necessary work and unfortunately, in some cases people have moved on completely.
I do believe that they all know at some point just how much damage they have created, but don't know how to fix it or are too proud to admit they screwed up. Just my two cents on all of this.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.