"How do you know that, when you've never tried me?"

He sighs and seems to slump a little at the knees as though looking for a wall to support him. "I know I've let you down before. I'll probably do it again, but if it makes a difference? I'll never not care. If you're going to hold out for some ideal of a person who never lies, never screws up... well you're going to be holding out one hell of a while."