So she ponders about him

Then again, if Yuhi knew about it, indeed, he would have said something to her by now. If he knew, would he get mad again? Sumire couldn't forget how he acted when he was angry. It was her fault, and yet it reminds her of before.

Yuhi has been very careful not to behave like Sano did. It has burdened him a lot since he has to be cautious about everything he says. 

But it still hurts. 'I thought he would leave again.' She thought she would end up abandoned. If that happened again, then she knew she would lose herself completely.

Sumire wrapped her arms around his neck and mumbled something quietly.

Yuhi patted her back. "I know, relax, okay? I'm not going to leave you no matter what you do."

He sounds so confident about that. "I'm sorry for being so insecure. I know it is stupid, but I just--"

"You don't want people to abandon you again, yes I know."

Why does he know? He shouldn't.