How did your last relationship end. Was it resolved. .. if not would you resolve it if you could

My most important relationship ended terribly it was the worst I've ever experienced...since then I have let go of a few people myself and had no problems, and some people have let me go on a nice note as well. But that one relationship wasn't a personal relationship but a professional relationship, it was with my old family doctor...It went from bad to worse to the absolute worst....that was 3 years ago and it still haunts me to this day...I don't know how to resolve it, all I know was that I did my best there is nothing more I could do...I just hope that one day these memories fade away.