Ya, you have to stand up for yourself. Win, lose or draw youll get respect. Two places were this applies...school till 12 grade and jail or prison. No, way around it unless you want it to keep going as is. People will say tell...not good idea. Mommy and teachers cant be with you 24/7. Been through it, just kick there butt. It stops.
Safety in numbers. If you see someone being bullied you stand up for them. Teach others to do the same. The more people stand up the more the bully will back down. Bullies are usually scared and insecure they will not do something that will show that fear.