[The words sting, because they're true, but Steve has to focus on stopping Bucky. And dodging the headbutt. They're drawing way too much attention.

Steve starts to fight back, enough to try to really restrain Bucky this time.]

Yeah, Buck, I'm a selfish asshole. Always have been. But Buck, they're gonna call the cops if we keep this up. You want to kick the shit out of me that's fine but let's do it in private maybe?

[The words come out breathless and disjointed because trying to fight and converse at the same time is very difficult. Steve finds a tiny opening in Bucky's relentless onslaught and goes for a headlock.]