You had been his best friend in high-school. For a month, he went to the same school as you... before his father moved on to another case, of course... but that month... you were his first love. At least, that eas how he saw it. His first kiss at 17. The first girl he had ever been with intimately. The girl he took to the stupid high-school prom. The girl he wanted.
But that had to end. And he had left without a word because of his father. Because of hunting. You would always hold a special place in his heart.
But now, it had been years later. He had loved again. Jess. But she passed. And his father was no longer around. It was just Sam and Dean, running around the country taking on cases and searching for yellow eyes and the colt.
One day, they were working on a case in a neighborhood after Sam had a vision about... well, he wasn't sure what he'd seen. But he and Dean had to look into it.
Sam stood on the porch of one of the many nice houses in the neighborhood, clearing his throat and readjusting his tie as he got into the mindset of his fake FBI agent ploy. He knocked on the door, reaching for the badge in his jacket pocket, but freezing as soon as he saw... you open the door.
A rather tired, disheveled looking you...