Aww that's so sad! My best friend has been bullied by someone for 2 years and I'll tell you how to stop. First of all tell a trusted adult if they don't believe you, tell your friends or family. I know you might be scared to talk about this with someone but it is worth it! Second, try telling them to stop and try to be kind back maybe they will be to you! Third, If nothing is helping then its time to report the bully on paper. Write down everything he does to you and how you feel, don't forget the date! Then give that paper to the principal. I hope this helped!