Got one more for you...it is AU in that the boys aren't hunters. Also, check the warnings.

Bend My Finger Back (Snap) by viviansface.
Summary: Dean is only seventeen when he hits his lowest, losing his mother in a fire. After that, his family seems to fall apart -- his father is suddenly distant, and between therapy sessions and trying to struggle through each day, Dean and his brother Sam grow apart as well, even though they used to be more than close before the fire. It takes Dean two years to grow tired of this and decide to do something about his life for once... but there's no telling whether his decisions are the right ones and whether they will eventually lead to the happiness he desires.