The Impala was Castiel's first car, but he'd always thought it was a big gas guzzler. He sat at his kitchen table, Dean and him hanging out casually, and after dating for six months, they were doing fine. It was like being regular best friends - but with more sex and physical reassurances.
"Hey, Dean?" Castiel called over to Dean, who was sitting on the couch, watching some cooking show. He looked up and hummed in acknowledgement.
"Should I get rid of my Impala? The thing is horrible on gas." He sighed. Dean got up immediately. "Yes. Sell it. Absolutely sell it. Get a better car for yourself."
Needless to say, They discussed a selling price and drove it out onto the curb. As Castiel was adjusting the sign, he felt a tap on his shoulder and turned around. "What - Dean...? What on earth are you doing?" Dean had parked his car on the curb and taken Castiel's selling price sign and stuck it on his own car. He handed Castiel a wad of cash and took the keys to the Impala. Castiel just laughed and pocketed the money, getting back in the car as they went to park it back in Dean's old spot.
Dean loved that car too much for it to be healthy.
Dean's old car sold quickly and Castiel got a Prius, which Dean teased relentlessly, but shut up after seeing all the money Castiel was saving on gas. Dean would spend an hour a day with the impala, tuning her up, sometimes just sitting in the car. The novelty wore off and Dean's Impala time turned into loving caresses and weekly check-ups.
Castiel would always smile when he saw the two together.
Dean and Castiel aren't very flashy - we're just gonna be honest. Their first date wasn't too special, their second, third (and so on), weren't that special either. Meeting was special, but awkward. Their first time having sex was certainly interesting, special, but ended up being insignificant in comparison to how much they actually have sex.
So, when they were sitting on the couch after dinner and a shower together, Castiel looked around and found that Dean's things were everywhere. He had long since given him a key a year ago, and their stuff was heavily concentrated in Castiel's apartment. Dean was looking around too. They looked at each other and smiled.
"You want to?"
"Of course, Cas."
"It's a big commitment, Dean. Its only been six months.'
"But we've known each other for a year."
"This is true."
That's how Dean ended up moving in with Castiel.
Sam took over Dean's old apartment with Gabriel, who were close friends now.
Dean would sometimes come home very haggard from the week, especially on Fridays, Castie would observe him quietly. He'd perk up after a while but today, Dean came home thirty minutes later and the haggard look wouldn't go away.
"Dean, spit it out, what's wrong? I'm getting worried about you."
"I saw my dad today."
Castiel didn't really need anymore words. Today was the day, ten years later, of Sam and Dean's dad's death. Dean must've seen him at the cemetery. Castiel pulled him close and cuddle on Dean's lap. Dean loved when Castiel would curl up. "like a kitten" Dean muttered and buried his nose in Castiel's fluffy black hair.
They stayed that way for a while. They weren't really the flashy/emotional type anyways.