Life Changing Obsession

This story is about and a teacher name Mr. Carlos who had fell in love with one of his students name Katie. He thought she was in love with him too. She always said hey and ask him questions about her boy problems. When he saw her walking down the hallway holding hands with her boyfriend. He became angered and jealous. Katie then started recieving weird, unprofessional phone calls and odd apprearances from Mr. Carlos. Katie starts getting frightened by and this new interest he's taken of her. One day Mr. Carlos attacks and attempts to kill Katie, saying "If I can't have you, no one can!". Katie called the police and got him put in jail due to her fearing for her life. A year passed and she starts recieving weird phone calls and having nightmares. Is it Mr. Carlos again? Is he after her again?