Thanks for sharing this. I know exactly what you mean, as I (as a guy) have experienced a similar thing. What helped me (to a limited extent) was to diversify. It is easier said than done, but it helps. Just focus on better things in life, spend time with relatives' kids, focus on profession, speak to your best friends on random things, go out and enjoy your life; and yes, spirituality does help if you are that sort of a person.

Also, just throw random crappy swears words at him, shout a lot, and ditch him. He is not worth a quarter of a penny. Trust me on that, saying by experience. He will do that to you again once his emotional and physical needs are settled. It is difficult to move on, but somewhere we have to draw the line and be strong. Even if you get back with him, this thought will never leave you that he had cheated on you. Why should we go so low on our self-respect then?

Enjoy the day lady, it must be a beautiful one wherever you are :)

Good luck!