I also have dreams, or passing thoughts about things that ex and I used to enjoy doing or people that are in my life now that I know that he would like ... I guess that these things are common.
During one of our last phone calls several weeks ago, he mentioned that he had burst out laughing just the day before when he thought of something funny that happened to us years before. I laughed too as he recounted the story !
I bring this up to say that they think of us too and far more often than they will ever admit to us or to anyone else. He also mentioned during that call that he thought of me a lot and that we were always the best of friends.
They have many regrets but most of the time they cover it up with MLC behavior.