The whole point of this I think is never get involved with someone who would cheat on you. If you do, it's your own fucking fault. You chose wrong. Nobody else. You misjudged their personality. Period. YOU fucked up. Ain't a damn thing you can do about it so move the fuck on. Live your life for yourself rather than wait around for someone who clearly is not giving you the same courtesy. If you get screwed, you get screwed.
Strengthen the fuck up people. You shouldn't NEED anyone like that as far as I'm concerned. You bring people into your life to improve your quality of living in some shape or form. Don't bring people in who will do the opposite. That's what life is all the fuck about.