"Am I with the most selfish person alive?" "Am I being selfish when I do the things I want to do?" "If you loved me, you would..." The battle of what "I want" versus what "you want" is intense. Couples are in a constant tug of war, squabbling with each other with no regard for their partner's feelings, with great guilt over their own perceived selfishness, or feeling somewhere in between. And it's...