He isn't sure what she's gearing up to say, but he's sure he isn't going to like it, whatever it is. Turns out his hunch was right, and Dean looks up, stricken by her words. Not even Dean's thick armor can keep that out of his face; really, there comes a point when Dean starts to feel so much that even he can't hide it. If Dean's close to having a superpower, hiding his feelings would be it, but some people know how to hack in, or some people know the right thing to say to bring it out of him. Cas is a big one. Sam, sometimes. And Jo. Jo somehow always knows how to get right at the heart of him.

"It's not like that at all, Jo," he says, his voice small and tight. "Everyone's gone. Everyone. Dad, you and Ellen, Bobby, Chuck vanished. We met my mom's dad, his part of the family -- all assholes, and all dead now." Lisa, Ben. He bites his lip, holding them back, because Dean still can't really talk about them.

"I've had to let go of anyone I ever knew, ever cared about. And then I got sent to purgatory, and you know who was there for me? Had my back the whole time, and even after, even topside? A vampire. And it didn't matter. It didn't matter to me what he was because he was there." Dean stops, clenching his jaw, and he finally looks away from her eyes.

"Jo, I have more room for you now than I ever have. Please. Please don't be another person who walks away from me. And please don't make me have to walk away from anyone else. I'm... I'm tired."