What do you do? You lay out BOUNDARIES, and you let him know what the CONSEQUENCES will be for crossing them.
And then you ENFORCE that.
What consequences, if any, has there been for him for his infidelity? You cook and clean for him, pledge your undying love and devotion, and pursue him? How's that working out for you?
Men -- heck, PEOPLE -- are path-of-least-resistance creatures. We will get away with what you allow us to. Time to stand up for yourself, Marie. As long as he is getting some of his emotional and physical needs met by this girl, and the rest of his needs met by you, he's not going to change a damned thing.
