So, now that I have been married a couple of decades, I can't say I have regret about a break up I instigated. But . . . I did let a good one slip away. I had just been through a break up when we met that hurt me. So, I was kind of a royal jerk to him. Took it all for granted as I was still thinking about the other guy. And THEN, I broke it off. Like a year later I was like "whaaaa???? That was stupid."