I seem to look back on past relationships I have had. Not just the romantic ones, but friendships as well. Somethings I handled well and some I handled poorly. One that still bothers me to this day was a friend who had some mental health challenges and was on and off her meds. I don't feel I supported her as well as I should have. I'd like to think I could do better next time I am faced with that situation.
I try to have too many relationship what ifs because when I look at my three wonderful children I don't think fondly of any scenario that didn't bring them into the world.