Best friend break up

Okay so my best friend and I recently broke up. I’ve never felt something like this. It hurts so much worse than a normal break up. I’ve tried so many things and it’s hasn’t helped. I’ve taken her off of most of my social media (she’s only on Snapchat). I’ve erased all of our pictures off of all social media. I have taken our pictures down and I’ve erased her from my room. But she still keeps coming up. My friends tell me when she’s talking bad about me. She’s doing things out of spite. I’ll do one thing, not even thinking about her and then I’ll see that’s she’s doing the same thing and sometimes she makes it better. I just don’t know what to do. I want her out of my life completely but I have really close friends who talk to her. She’ll see that we are going out and she’ll just invite herself. It’s really frustrating and I just need some advice cause I don’t know how much more I can take..