Odd account dedicated to teacher

I was on tiktok as per usual..and i came across a slide saying how much they missed their old teacher, id didnt think much of it until one of the comments where talking about how their whole account was about said teacher so I look into it and...all of their post is about the teacher, only a few are about ops parents but they are all about the teacher, and then...I found this,(the photo) From what one can see, the user is saying the teacher has cut off contact with them but its still odd..and its obvious op is struggling with mental health, and has stated that they are not in love with teacher, and even commenter find it strange..and in some of the post op has taken pictures of the teacher when she busy or has her back turned etc,its strange I just needed to talk about this, literallt almost all of ops post is.about.the teacher. ADDITION+ What made this even stranger was that they posted a tiktok called teachers pet with that character pretty little liars, I dont know anything about that show but I do know that character gets in a relationship with a teacher.