" You're not friends. You'll never be friends. You'll be in love 'til it kills you both. You'll fight, and you'll shag, and you'll hate each other until it makes you quiver, but you'll never be friends. Love isn't brains, children, it's blood -- blood screaming inside you to work its will. I may be love's bitch, but at least I'm man enough to admit it. "

― Joss Whedon