[He knows that's not it. His Dad's dying wish was that no matter what, Dean has to watch out for Sam. Take care of him... but this time was different. He said he had to save him and that nothing else mattered... and that if he couldn't- well, he doesn't like to remember the end. The boss had big plans for Sam and they were already in the DA] I wish I could. I wish to God I could, but I don't get the luxury to walk away when times get tough or when I find a pretty girl who says she likes me.
No, I gotta stay here looking after you whether I want to or not. [He looks away, thoughts clearly eating away at him.] Look Dad said- [No, he stops himself. His father made him promise not to tell]