If you cant stop cheating, then stop torturing your partner and get out of the relationship. If you want to stop, then get counseling for yourself and get to the root of why you have this behavior. It is 99% of the time not about the sex. It is about the way you view yourself, something from your upbringing, etc...but fix it, because once you experience a committed relationship, you will lose your desire to wander. The grass is NEVER greener on the other side, just a short term thrill.