Now I'm not writing this to turn anyone on. If you happen to come accross this, read it and give me some advice. 

I have never really wanted to cheat on my girlfriend. We have great sex, she's amazing, and I want to marry her; I have no reason to want to hurt her. These past few weeks though, have been putting me in a bit of a bad situation. I have had the sudden urge to want to sleep with another woman, I really don't want to do something I regret though. 

To anyone that has cheated and kept a working relationship after cheating: Have you felt any sort of guilt and has it at times become unbarable? Is it something that you regret or enjoy? What kind of advice would you give me given my situation?