Who Knew
Sometimes Sam remembered when Dean use to tuck him in at night when they were kids. Sometimes he thought about those days, when he and Dean were so innocent, before Sam learned about the monsters in the dark, before they found comfort in each other. He would remember Dean's smile when he thought Sam couldn't see, he would remember Dean's kisses how they were the sweetest things in the world. He would remember the first time they were together, how Dean was so afraid of hurting him and how gentle Dean tried to be, even though Sam just wanted to go fast.
The angels were right, they were co-dependant on each other, and Sam wouldn't want that any other way but that was before he died, and Dean sold his soul and went to Hell. Sam was alone and all he could do was remember.
While laying in the dark by himself, trying to find comfort in the place where Dean use to sleep, taking comfort in the fact the pillows hadn't yet lost the smell of Dean, he remembered Dean.