Storylne update!!

Ive been working on an overall summary of how I want the story to go. Something along the lines of:

A young teenage girl with un-diagnosed serious mental health issues develops an obsessive-type infatuation with her male English teacher. She stalks and follows him all day at school and outside of school. She befriends his wife and daughter so they often see  each other outside of school. The entire time she watches him, she comes up with a plan to get his wife to leave him, and his daughter to stay. The male English teacher is aware of his little stalker and he has been playing coy the whole time, getting enjoyment and sick satisfaction over the teenage girl lusting over him. 

This is all I have for the basic premises so far! let me know your thoughts on this!