I think the only way to get over this (get closure-cheese i know!) is to contact him somehow, just say hi...tellll him you've moved on in your life, see if he has anything to say to you, if you want to talk about what happened, do it, get it out of your system, other than that, i think the main thing is to focud on your fiance! There are so many times in life when we did one thing but could have done another, no point thinking about the "what ifs" of every single decision we make!