Love.
"There comes a point when you just love someone. Not because they're good, or bad, or anything really. You just love them. It doesn't mean you'll be together forever. It doesn't mean you won't hurt each other. It just means you love them. Sometimes in spite of who they are and sometimes because of who they are. And you know they love you, sometimes because of who you are, and sometimes in spite of it." ~Anita Blake