Mean people :( help or advice?

Every one at school calls me a slut or a hoe and i dont no what to do and i cant teachers or parents cause yhey already did so much and every one calls me thos syuff just cuz my butt and boobs are alittle bigger than every one eles and just cuzi like a guy in 4th grade amd i Am in 5th and he is 12 i and i am 11 and cuz my ex boy friend made a rumor that i gave. Him a ********. And i dont no what to do cuz i cant fight all of them of cuz its boyz and girls help asvice Anything plz