Learn taekwondo and karate. Go and buy an electric baton with one electricity and two electricity, and sneak home in droves. Before asking what to do, you should first ask why your personality and other problems have caused this kind of thing. Don't be too cowardly. Cowardice can be changed as long as you have the heart. Girls should learn to protect themselves, or find a strong boyfriend, or call the police or report to the school for handling. That's what people do. Without a heavy fall, it is like a raging river that never stops.