What was your "one that got away" and where are they now?

Not one, just a lot of potential I didn't have the eyes to see at the time. I was a jackass who made up problems to stop people getting close, or made everything a dealbreaker, or held people up to standards even I couldn't maintain. Once I sorted through enough decent people to find someone just as toxic, I'd settle down for a bit.

Now I'm with myself and only myself, I was the one who got away.