I heard about this once a long time ago. They hurt your feelings, you get them back. What was that name again? . . . oh ya - O.J. Simpson! Hey, he got away with it - maybe you will too!!! L E T I T G O !!!
The more you hold onto it the more miserable you make *yourself*. Trying to get back at him will only hurt YOU more in the end because you're fixated on hatred while he's moved on. Just decide to drop it & every time you feel angry or hurt, think of something completely different (& happy, of course). Good luck.