Break up

Breaking up from a friendship is harder than I thought it could be, I don’t consider us friends anymore even after knowing that I’ll be alone without her, but I don’t know how I can stop talking with her when she keeps talking to me, I don’t want to tell her that I’m no longer her friend. I don’t feel good when I’m around her and it’s been like that since when we met about three years ago, I decided that it’s just not worth it, it’s not worth feeling so bad and torturing myself for being around somebody.