When you see bullying, make sure you report it. Don't stand for it, and don't support it. When you are bullied, don't hide it. Make sure the situation gets remedied, so fear is removed from your educational experience. Get certainly the school administration, your teachers, guidance counselors, and your parents involved if you need to. I know that not all schools and parents are accommodating to such concerns, but at least give them the opportunity.
There's no shame in fighting against bullying, and it's even quite heroic. It's a huge problem at all levels of compulsory education. This includes bullying from other students online as well. If you're truly ambitious and you feel your concerns are being ignored and you're at a loss for where else to go, you could try going to the media as well.