The blank stare Ben gives Lincoln is because he's asking him something he doesn't want to answer and the other will have to start pulling teeth for. Oh, and because he suggested that Ben and Jacob should basically talk about their feelings. Which felt like the worst idea, in Ben's mind.
He blinked, shook his head, and said, "Or it's way better to just never discuss it and just see what happens." That was what was working so far. He didn't see why they should flip it on its head. Ben did sigh though before adding, "He's... I don't know. I'm not like, really bothered by it with him? That's weird right?"