He took a deep breath, checked his hair in the reflection of his phone for the seventh time, and then rung the doorbell of Omega Delta Phi. Almost too quickly, Dean opened the door with a smile on his face, then half-yelled "You're here! C'mon in." Dean touched Castiel's shoulder as he brushed him through the doorway, and Castiel wondered how he'd make it through the night if Dean kept this up.
Dean practically pushed Castiel down onto the couch, then sat down beside him and asked as nonchalantly as possible, "You want a beer?" like he hadn't just stolen Cas' soul right out of his body. Castiel didn't drink, but he figured, It's Dean fucking Winchester, I can make an exception. And he nodded in response.
Dean got up and left Castiel alone for a few minutes. Castiel took in the odd looks he was recieving from the other attendees, he imagined they were looking at him and wondering if he was lost. (Castiel was out of his element, and he knew it.)
"Here." Dean passed Castiel the beer as he sat back down beside him. "Thanks." Castiel replied, taking a short sip. "Tell me about yourself, Castiel." Dean asked him. Castiel's mouth hung open as he tried to figure out what to say. "Well, uh, I study biochem, -" Dean moved his head so close to Castiel's that he could only slightly feel Dean's breath on his cheeks. "I don't give a crap about what you study," he whispered, "I wanna know about you." Dean reverted back to his original position, then tapped on the beer in Cas' hand and told him, "You oughta drink that." Castiel without argument raised the bottle to his lips, chugged the entire thing, and then noticed that he had locked eye contact with Dean the entire time.
It was going to be a long night.