I've had stuff like this happen to me quite a few times, once my sophmore year, my religion teacher. And one of my english teachers. Not so much deeply in love, or lust or infatuation. The main reason I guess was cause I was going through hel in high school and my religion teacher always backed me up and was sorta like a therapist for me in school. Also she was really smart and into the same type of music and movies. One of my english teachers moreso because she can hold a conversation steadily, without being ditzy, (plus she looks like an older version of Aeris from FFVII, just noticed that today)