Help me please this girl is crazy?

So I have a situation with this one girl and we use to be freinds not very close freinds but friends (let's call her Natasha) and my friend Tatianna and AnaMari let me know that she is talking about me and my best friend Denise with Mallisa(Mallisa is Obease) I ignored her andeverything and she pretending as if she didn't do anything then at the end of the skool period she yells I don't know y everyones mad at me she acts as if we are the only people who talk about her.after the break I walk in to the computer room to type an essay and she says don't come in here and start ur **** I told her wat I are u talking about I just walked in and then she yelled I yelled I got kicked out the room. She is telling the councelors that I bully her and they believe her and alls I do is ignore her not look at her and not pay attention in counceling the councelor wanted to talk to me and her I told my side and she denied everything then she said that my freind Denise is bullying her as well and tatianna and AnaMarri are laughing. She turned my freind Daniel against me and thers a group of 3 girls and 2 guys who hate me b4 the situation they never hung out......alot of people believe I'm bullying her cuz it spread and her mom is coming to skool to talk to everyone wit principal cuz her daughter got home crying and she said it's because of us. Im in big trouble for doing nothing I don't think she liked me to begin with cuz she always yelled at me