You will continue to grow closer to your kids. That is one of the bright spots in this blackhole.
I used to get p*ssed at my ex for dumping the kids too. Now I take them whenever I can get them. They NEED you the stable one like never before. I have them more than half of the time.
One day, they will regret that they have missed out on the most important thing in life....children.
I don't know about you....but I NEVER want to be in that position.