It wasn't until the trio were seated in the living room watching The Simpsons that Castiel noted something off with Dean. Instead of lounging against Castiel as he usually did, Dean was sitting up straight next to him. He kept fidgeting, glancing between the T.V. and Cas numerous times. By the end of the episode, Cas couldn't handle it anymore. He turned so that his whole body was facing Dean, tucked his legs underneath him, and put his hands on Dean's shoulders.
"Are you okay?" He asked with a tone that clearly communicated that he thought the opposite. Dean stared at Cas like a deer in headlights for a full minute before he turned to Sam, who was sitting on the floor in front of the couch with his back turned and his eye fixed on the older boys.
"Scram, Sam." Dean said, to which Cas and Sam both rolled their eyes.
"You've been waiting your whole life for that, haven't you?" Sam grumbled as he hauled himself to his feet and out of the room. Dean chuckled despite himself, then turned his attention to Castiel.
"I'm okay, Cas. I promise. It's just, I remembered that next week is Homecoming."
Oh. No wonder Dean had gotten squirmy. He's going to ask me to the dance! Sure, Cas may have been jumping to conclusions, but after spending nearly all of his life in Dean's company, he knew he was right.
"So it is. I don't understand why that made you so fidgety, though." Cas said as stoically as possible. If he played the opposite, maybe he could get Dean to squirm from the the chick flick moment he had started.
Dean heaved a sigh, and hid his face in his hands. "You're playing with me, Cas. Stop it." He whined.
Cas fought a grin. "I simply don't understand." He insisted.
"Stoooooooop." Dean groaned, face still hidden.
"I'm waiting." Cas baited.
Dean dropped his hands and looked up at Cas. Oh my God he's blushing. Cas made a mental gesture of success.
"I was...because...will you be my date?" Dean finally asked after two other flustered attempts to speak.
"Of course!" Cas replied, shifting so that he was now more or less straddling Dean. He kissed his forehead, then trailed kisses down the bridge of his nose until he reached his lips.
"I love you." Cas whispered.
Dean couldn't stop kissing him after that.