Are there any fics at all out there where Dean is just fed up with Sam and leaves for good? Like after Dean confronts Sam with Ruby; where Sam's been out of hell for a year and never told Dean; or when Sam let Dean turn into a vampire. I've searched for similar fics but they mostly ended with Dean coming back and forgiving Sam and unfortunately that just doesn't sit well with me. Bonus points if Sam feels really guilty and tries to get him back (without success of course).

Thanks :)