You lose that argument with yourself.-

"Iris: And why don't you leave her? Because you're hoping you're wrong. And every time she does something that tells you she's no good, you ignore it. And every time she comes through and suprises you, she wins you over, and you lose that argument with yourself, that she's not for you.
Miles: Exactly, and on top of that there's the old standby, I can't believe a girl like that would actually be with a guy like me. "

( ¿Y porque no lo dejás? Porque estás esperando hallar que estás equivocada. Y cada vez que hace algo que te hace descubrir que no es bueno, lo ignorás. Y cada vez que viene y te sorprende, te gana, y perdés la pelea con vos misma de que no es bueno para vos. )