Don't try to justify cheating.
wordsoflove: Cheating is disgusting. It’s a disgusting act and in no way, shape, OR form is there a valid excuse for it. If you want to cheat, just break-up with your partner. No need for the sneaking around, or lying. Also, cheating as some sort of “revenge” is just as disgusting. So again, don’t try to justify cheating because you can’t and you never will. :)