Keep going? She says it like it's so simple. Just get over her getting hurt, like it wouldn't destroy him. He can take a hit and not even think about it, but it is different with Gwen. She doesn't think it's his responsibility to protect her but she's wrong. Spider-Man is supposed to protect everyone and okay fine, her safety is probably more important to him in the long run, but he couldn't just keep going if something happened to her.

He can't give her a laugh, even though he can tell she's trying to lessen his discomfort. "You don't even have a mask," and he's trying to joke but he just can't get there. "If we trapped them on the bridge I could deal with them, and the police trying to get a blockade together won't get hurt, but..." Yeah he doesn't know how they'd possibly go about doing that, unless they raised it.