For #1 The Long and Lonesome Highway. Summary: What if Dean went to Sam at Stanford for help trying to find their father, and Sam said no? Who would he turn to? Would the Devil's Gate still be opened? Would Dean still make a crossroad's deal? Would Dean still meet Castiel?

http://archiveofourown.org/series/14143

Thanks so much!!!!! :)

For #3:

Learning to Breathe (http://jassy3399.livejournal.com/105527.html) by jassy3399
Summary: When he was fifteen, Sam confessed his romantic feelings to his brother. Rejected and unable to face his brother again, Sam runs away. In an effort to stay off his father's radar, he turns to a life of crime to get by. As it turns out, he's pretty good at it. (Sam/Dean)

Thank you! I appreciate it! :)

For #1:

Been Away Too Long (http://archiveofourown.org/works/3557165/chapters/7833800) by safiyabat: "AU - canon divergence. When Dean showed up at Stanford to collect Sam and find their father, he reconsidered his choice and went to Jericho alone. The brothers never reunited; nothing happened as Heaven or Hell intended. Five years later, a new threat from the Abyss emerges and Castiel, Angel of the Lord, is tasked to bring the Righteous Man back together with the Boy With The Demon Blood once again.He's pretty sure that what happens next isn't what his Heavenly superiors had in mind."

For #3

Dirty Deeds Done Dirt Cheap (http://rei-c.livejournal.com/847738.html) by rei_c: "Finals week at Stanford, and Sam's priorities suddenly shift thanks to a visit from two government agents." (Sam "runs away" from Stanford, but other than that it fits your request)

Am I correct that you're not interested in Wincest recs?

Thank you so much!! I really appreciate it! Yeah, Wincest isn't so much my thing. :)

For #2: It doesnt follow your request exactly, but it does have girl Sam. Be warned it deals with themes of Sam's nonconsent arcs and nongraphic/implied rape.

http://archiveofourown.org/works/991553 The Thrift Store Tragedies by Blue_Jay

Thank you so much!!! :)