She's gone so far inside herself. Steve sympathises; he needs his alone time too, and sometimes the best way to do that is inside his own head.

Maybe he's pushing her too much.

He gestures at the food. "Eat something, if you want? Bryce... I don't want to force you to do anything you're not ready for. Just want you to know that when you want company on fighting this, whether you take big steps or small ones, I'm here for you."