Bucky was aware of when Steve walked in because Bucky was rarely not aware of someone walking into a room so long as it wasn't wall to wall people, and he was almost always hyper-aware of where Steve was. But he didn't look up, since he was mid-text and waiting to see if Loki was going to give up an address. He finished the text and then looked up, phone still in hand.
Steve's shoulders were hunched, hands shoved in his pockets, looking for all the world like he was trying to make himself smaller. That didn't work out so well anymore, he wasn't anything but a big guy, these days. But Bucky always saw the echo of the kid he had been, moments like these. Steve sounded like hell, which wasn't a big surprise. But he was sounding like shit in the wrong place, with the wrong person.
Which shouldn't be a surprise either. Wrong place, wrong damn time was practically Steve's life story. It just usually ended with someone punching him.
"No, never," Bucky said, because he never did mind. "But you're in the wrong place, pal. You should be with Peggy." He motioned toward the empty space on the bench seat next to him though, scooting closer to the window to give Steve room.
Maybe it was good. Bucky had something he wanted to give Steve anyway. Bucky didn't think Peg would disapprove - Peggy understood a lot of things. But Steve might need some convincing to accept. So a couple of minutes before the chaos of the Capitol just them, Bucky would take it.
He took in the shadows under Steve's eyes. It was almost instinct to ask if Steve was all right. But that was a bullshit question. Steve wasn't, and he shouldn't be. So Bucky blew past it. "Get ready for them to spend an hour making up those bags under your eyes, Rogers. I could give you a coupla black eyes and no one would know the difference right now," Bucky said instead. It was rich coming from Bucky, who wasn't any better. But it was better than asking a dumbfuck question.