I broke up with her for no reason.

After reading my friend’s text, I spent all day racking my brain trying to think of the exact reason that I broke up with my ex. I had zilch! There was nothing about her that was not absolutely normal and something that I could not live with. If I had just put things into perspective before, I would not be so desperately advice to get an ex back. We probably could have actually been married by now. How could I have been so stupid and naïve just six months ago? What is so different about me now that I can see this clearly?