Should I end this friendship?

I have one friend who I got close to when I first met her. Once we got into an argument and she leaked my face so I leaked hers. A week later, she comes by saying that this guy named Xavier leaked my face. I obviously know this is a lie, because this Xavier kid sounded and reacted EXACTLY like my friend, but I didn't want more drama so I accepted her apology. A few weeks later we got into another argument.. After I blocked her again, she didn't try to get me back, but instead edited a picture of me saying the N-Word. A few days later, she said she pretended that she never knew it was edited and that it might of been her friends. This again, was another lie. In the edited pic, it showed me saying the n-word to HER, and not anyone else. How can she think it wasn't edited when I never ACTUALLY said it to her, but the picture said that I did? Of course, I know for a fact she didn't edit it because shes a horrible editor but I know that she knew it was edited, but still threatened to "expose" me for nothing
. The arguments over now. She has all these accounts that she claims to be her friends but in reality I know some of them are just her alts.
 One guy, called Alex, texted me Ik you like Mia. and then he threatened to expose me if I didn't "back off his girl" aka my toxic friend. I'm beyond mad. Looking back at it, she has lied, spread my pictures around asking if I'm cute, and spread my secrets around. Not to everyone, but to her very close friend. I'm a guy, 15 years old btw.