Dear Carla, I enjoyed your post very much and it got me thinking. You are right, you know? That "oneness" you once enjoyed (and that I hope you will regain) is a feeling few humans are granted to experience, in my opinion. I'm not talking about the period of time when you are in love (we all know what that's like: ecstasy), I'm talking about maintaining that feeling or something very similar once the novelty wears off. I read a few months ago a doctor had carried out a study from which he drew the conclusion that some people manage to remain "in love", to maintain the "oneness" throughout a lifetime, but that only happened to a very small percentage of the population. The doctor himself mentioned he "envied" those rare people, because although he enjoyed a very warm relationship with his wife, he knew he didn't reach those heights. In such a case, of course I agree it would be a "crime" to break it, but then who would even feel the slightest inclination toward anybody else if he was totally absorbed and felt in nearly perfect fusion with the other one? And even in this case, would sexual unfaithfulness be more "delictive" than other "crimes" like flirting with somebody else even without touching him/her? I still see no difference.
Sorry if I'm not making myself understood. This is a very delicate subject.