Could it be guilt that I am cheating or something crazy like that?
That is exactly what it is. It is normal after such a traumatic experience to not be able to "perform" in the bedroom. It is a clear indication that you are still very much hurt and you still love your wife very much. Sloooooooow is the name of the game here. I think you should GAL and go out but be honest with yourself and be honest with anyone you meet. In the end you are protecting yourself and them.
