"Yeah, she did some of that to me, too." Obviously, Finn had figured out where she was. Seeing him and hearing from Chewbacca that it was Finn's idea to come for her... someone actually showing up for her. It meant everything to her.
She also looked to BB-8 as the droid interrupted. The "intake" had been helpful for her and she didn't doubt it would be for Finn, too. "Poe and I haven't been here long, so they're definitely better at telling it. Do you want us here when they do that?"
Finn's remark about understanding BB-8 made her grin. "It's not that hard. Can't you figure it out for yourself?"