Don't wanna be you friend anymore?

I have a friend she is really annoying, smelly, bad breath , untrustworthy ( u tell her a secret or something like that and she tells it to people), fallows me everywhere ( like at lunch and recess), gives u lots of headaches, always want to work with me, talks with a mouth full of food, has to sit by me at lunch, all my other friends hate her no one likes her, what should i do i don't wanna be her friend anymore