you don't have to say anything

"Don't think about it too hard, buddy, it'll only make the panic worse," he smiles soft, kindly, eyes twinkling in a way Cas has seen only a rare few times; he stills doesn't understand what it means, the hand in his hair scratches lightly at his scalp, "c'mon, I told you I was gonna take care of you, right?"

He isn't quite sure if it's a rhetorical question or not, he's still not all up to date on the way Dean uses language. He nods slowly, anyway.

• • • • •

or the one where Cas has a panic attack and Dean knows what he needs