[ He doesn't know what the smile's supposed to mean, not when it's there for him to see and attempt to decipher. So, he just lets it go and thinks about how nice it looks on him instead, the things he rarely gets to see on Cas unless it's from some dumb book he's got his nose stuck in. Dean stops short just at the top of the steps, scuffing his boot along the stone as he considers the question. There are a thousand different things he could tell him, each emphasizing how much he wants Cas to be there with him, but in the end, Dean only shrugs with one shoulder partially raised. ]

I dunno. Sam's still got this whole thing here, and I-- [ don't. It's not like it'd be good for him to stick around anymore than he already has anyway. ] I've got stuff back home. You know how it is.

[ The family business and all. His dad hadn't been all that happy about sending them both abroad either, but he's pretty sure it's what his mom would've wanted had she been around. It's still a sore spot, which is why he elects to stay here half the time during breaks if he can manage it. (And okay, the other half has to do with trying to get closer to Castiel, but it's not as if he'd come right out and admit it.)

He scratches the back of his head. ] Maybe you could, uh, you know, come visit or something.