Wat to do about my older brother?

my brother is 17 im 13 im taller then him but he is really strong and im weak my brother always trys to prove me wrong i once downloaded a song for my school project wen my brother saw it he said delete it i told him i needed it for my school project he said no and told me to delete it i said no he said do u want me to hit u i said no then he said delete it i said fine and did, things like that happen to me all the time and i want it to stop but i cant hit my bro cuz hell hit me back i cant call the cops becuase they dont solve problems like this abd i cant tell my parents cuz i dont do thins like tell people and i want my bro to stop hitting me and pushing me aruond like a 2 yearold i want to stand up to him but i just cant he always tells me to do thigs for him and i know wen he grows up hes wife would leave him but he told me i wont get married so wen ever i talk back and tell him no i wont do this for u he just says ur being a smartmouth so shut up HE TREATS ME SOO BAD WAT DO I DOOO