Bea felt down after their snack. But she's not in the mood to eat dinner so he told him that she's going upstairs and that she's not going to eat dinner. She gets it. It's good that he's distancing from her. He shouldn't get close to her because he'll die if he would.
But why does she felt down when he's saying no and pushing her away from all of her teasing? She wanted him badly, but she had no choice but to ignore her needs and just sucked it up. Maybe she should date someone else, so she'll have her mind off her.