Bullying

There is a girl in my class who will not stop picking on me and my friends I have tried talking to her and it keeps on happening. It is really hurtful and ever since then when ever it is talked about I feel like I am going to die. I get really nervous and I do not show it but I am really scared. What if she says something that ruins my middle school.  Me and my friend are scared to go to the bathroom with out someone going with us.  I was coming to you guys because maybe you have tips or have a experience with it please comment them down bellow. I am not going to tell you guys what they said because I do not cuss but I really need some help.
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