Search Results: period after sex

so there's this girl that has a crush on me which i figured out very clearly since she would always hug me when 1st period ended and before 5th period started and found out that she's bisexual so then after she started grabbing my ass but i didn't overreact cz i thought maybe a friendly ass grab maybe? days later she grabbed my ass two more times which made me feel uncomfortable and feel like a sex object so i told her to not touch me and she tried to smack my ass again after telling her not to so then i told her not to touch me at all including hugging me after i told her that the next day when i had p. e for 3rd period as i was taking off my shirt to put on my pe shirt she popped out right in back of me and the back of her hand rubbed against the side of my back and she left. I don't know how she knew i had pe for that period and where exactly my locker was. that same day the school day ended as i was walking down the stairs i heard her friend yell out 'look there goes your bae!' so i turned back and there she was in back of me , so should i tell a trusted teacher to tell her to stop bothering me or straight go to the dean but at the sametime i dont want to be a bitch but then i dont want to feel uncomfortable at school and basically thats sexual harrassment.