Study 

Sam studied Dean more then any subject in school

or lore about Demons and Monsters

He knew every habit , every routine

He looked to him for answers.

Sam wondered if he knew that even though they've grown 

Dean would always be his heart 

But his brother must have always known 

because Dean studied Sam from the start.

Screaming Inside (sam POV)

Every time I fall asleep 

I dream of things that crawl and creep

Of things I've done and ones I've lost

Of things I've seen and lines I've crossed

But I no longer toss and turn

I guess its because I finally learned

that this is what my life became

and when I wake I'll see the same

Dean wont be awakened by my screams

when I know the worst of my nightmares are the best of his dreams

Until my tongue become untied 

I'll Toss and turn and scream Inside