I can see where the teacher is coming from. She wants him to stay because she has no one she can come home to, and our MC is filling that gap for her. Then, she got all caught up in it, got addicted to that feeling until she feels like she wouldn’t be able to live without him and became extra clingy.
Damn, I could use this in a story i’m writing, even if it’s fairly common. I just love how the author paces, processes, and writes the events. It feels pretty smooth yet abrupt at the same time.