You shouldn't pursue your teacher as a romantic interest.
Bobby thinks his favorite teacher Brenda is smart and attractive, and stares at her during class.
Bobby wants to express to his attraction.
Bobby keeps his crush a secret and writes a journal about his feelings towards Brenda and keeps it to himself.
Bobby stays after class and tells Brenda she's beautiful and would make a wonderful girlfriend.
Bobby eventually outgrows the crush, and Brenda is never put on the spot, and their student/teacher relationship stays strong.
Brenda tells Bobby it's not okay to date students and their relationship becomes awkward.