It's not necessarily sending him away. He's offering to do this for her, even if he does still think she should cut her shift early and get more sleep. "Okay. Be right back."

And he zips off to the dining area really quick, hurrying to grab a donut for her before returning a couple of minutes later. Not that he doesn't think she couldn't handle herself on her own. She definitely, completely can.

He just wants to be around her as much as possible. "Here."