J.L.
Lust is fun. Love is hard work. You have a relatively short period in any relationship where it is the honeymoon period. Then you have to spend the rest of your life learning to really truly love your spouse. It may seem like there would be so much that you could be missing with an ex, but even if you get back together with your ex there is still going to be hard work learning to love him for the rest of your life.