Im having a lot of bullying issues going on and i dont know what to do about it. i feel scared and alone every?

day I know someone is gonna mess with mw, humilate me, beat me up or something worse. If I tell on them they will tease me and outcast me even more. I can fight but not four five or six guys at once. What should I ..do? By the way I'm 15 male and a sophmore but I take senior and college classes.