Initially, he thinks it's a no. More than friends in the sense that they were brothers, family, closer than two people generally get. He thinks it's going to leave him stranded and alone with the ideas he's been harboring about what they might have been. And then Steve chokes out the truth, and it leaves Bucky with parted lips and a blank mind, trying to wrap his head around it all.

He thought so.

He wasn't sure, but he thought so.

Slowly, carefully, he nods. Were they two normal, healthy people now might be the time to act on it. As it stands, this is so... tentative, he isn't even sure who he is anymore, let alone who Steve is, and so he doesn't. Just nods like he understands, and then tears his eyes away.

He needs to think about it all.

Slowly, carefully, he starts unlacing his boots. Murmurs a soft, "I think I'm gonna... try to sleep."