Doing this is too much?

Hello, I would like to give you a name, and I would like to replace myself that I am currently studying in middle school. This is actually a school that we have just moved to because it is a high school. At first, I was worried about whether to get along well with new friends. But when I came to the exam and met new friends, it made me feel more comfortable because all friends are very friendly and kind. But after about the beginning of semester 2, I went to school as usual, but my friends in the same group started to behave like insults. Sometimes I started to make a stiff face at me without even knowing why I didn't think. At first I thought that my friends would be Found bad or stressed about having to solve 0, but later we started to think that it wasn't anymore because sometimes we were just dormant. He came to tease us. We knew that it was a prank to our friends, but the prank was really too much. It may not be too much for some people, but it was too much for us. At first he teased us by taking our cell phone from our hands without permission. We tried to say good things to get it back. But he didn't listen and ran away to prevent us from taking the phone back. We became frustrated, so he shouted at him to get the phone back now. He laughed and said that this was angry. Wait. When we heard that word, we got more frustrated, but we knew what to do. It didn't work well. So we just went to grab the phone back from his hand. We told him honestly that he didn't like it. He stopped doing it when he knew that we didn't like it. Which seems to be good, but not at all. When he didn't mess with our phone, he messed with us instead. He liked to ask strange questions. He asked what our phone code was, we answered bluntly, but he asked more. Until the end we had to answer, but we knew what he would do for sure. So we chose to keep the phone with us all the time and never anyone but the teacher. And In addition to this, there is a story that he likes to insult us when we forget to bring a book or book to study. We admit that we often forget to bring it, but it shouldn't be insulting, isn't it? We know that he insults for not forgetting to bring it again, but his insults always make us feel bad. We try to pretend to ignore his insults, but we feel terrible. We can't tell parents or teachers because we are afraid that it will be a big deal. We don't want parents to be tired too much, so we choose to be quiet and not talk about it. But I think it's really too much today. At that time, we came in line a little later than the same time, so we had to come in line as The last person, but before he let go to see the mentor teacher, a friend in the same group who came later than us ran in from behind us. We don't know if he intended it. But when he ran, his bag hit our head hard. We felt hurt but couldn't do anything. We just said it was too much. It hurt like this. But he just laughed and apologized without paying attention. And besides all this behavior before, he likes to act like we don't understand the lesson even though we understand it well because it is easy. When having group work, we try to help as much as we can, but he often acts like we don't help at all. We want to know what we should do. Everyone can comment on this.