"Yeah, I can tell." Which means he probably isn't fine. He can't help but think about what Cas told him, about how he feels after everything that went down in Heaven. While he doesn't disapprove of booze as a coping mechanism, whenever Cas gets like this he remembers that drugged out version from the Croatoan future, and it wigs him out.

Cas is wobbly, so Dean comes over and pulls Cas's arm around his shoulders before he steadies him with an arm around his back.

"I'm fine. C'mon, let's get you back." He sighs. So much for his beer, but once he gets Cas settled, he can come back.

"So what're we celebrating, Cas?" Even though he's pretty sure this isn't a celebratory drinking occasion. Dean's new to the so tell me how you're feeling gig.