How to leave a toxic friend?(?

On my last post, I had stated that I had a friend that wasn’t exactly the best. A lot of you guys said I should distance myself, which I have (and did before I made the post) and today she texted me saying mean stuff and calling me names. If I go back to school I know ima have to deal with her and she will turn all my friends against me. Any advice please?🙁
How to leave a toxic friend?(?
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