Steve's first instinct, is, naturally, to move closer. To tighten that grip on Bucky, to slide down next to him and wrap his arm around him. To let him know he's okay, he's not alone.

He also knows that's probably going to make it worse, and instead pulls his hand back, clenching it at his side so he doesn't reach out again.

"Hey," he says, softly. "Hey. Sorry, I - thought that was a good idea. Probably should've known better, huh?"

God, Bucky's got to be sick of Steve apologizing to him. "Do you want me to back off?" he asks, quietly, admittedly already shifting a little, assuming the answer will be yes.