Im in need of help.....please answer..?

so me and my friend were in the auditorium, in my school and we both hate this girl who was really mean to us so we stopped talking to her. so then the mean girl started talking to me and my friend was like why r u talking to her because she was really really mean and we hated her, so the mean girl kept telling me to sit next to her but i didnt say naything so then my friend thought i was talking to her and i was being "2-faced" because she kept asking me and the mean girl was like making fun of my friends country and then we had this whole argument and she cursed me out in front of everybody and everyine was just staring and then she was like i started it because before we were friends and she used to talk about my friends country and then in the auditoruim she was doing that to make me be friends with her but i wasnt. so then i told my friend that she was maing fun of ure country and i dont wanna be friends with her. then at the end of the day she said she wants to fight me then my friend told the teacher and im really scared about tommorow.. im crying right now because i dont fight and when i tell her to calm down she gets mad and the curses me..im scared what do i do.. i hate this..