Womens feelings of love start with respect for a man. Standing up for yourself, stating boundaries and enforcing them are where you start.
Think about it. How could she respect you if you told her it was ok to be with another man? You don't respect yourself or care about her honor to take a stand and say "No."
Well that is true. Which is why I finally said look I cannot take this anymore. And now Im saying now, I wont be in a sexless marriage. I reached my limits with her crap and stood up. The problem is she is so myopic about the pain of losing her "other" partner that she isnt hearing me right now.