I've always been confused by what constitutes a healthy relationship, since different people always have different standards. Take my parents, for example. They met in college, married several years after they graduated, and stayed together until my father passed away last summer. And when I say "stayed together", I quite literally mean it. They did not spend a night apart from each other from 1969 until 2006, when my father went to Maine on a hunting trip with my brother. That was quite literally...