Fake friends and I always feel sad

Hi this is my first post but I think I have a group of fake friends . One of those girls she was my bff and we stayed with another girl . A few months ago, she started to tell secrets to that other girl(they were about boys not about me) and kinda like put me aside. Also every time that I used to talk to the other girl bff said to us " I kinda feel like u reject me " . They are always hiding stuff from me and when I ask they don't want to answer . Yesterday, I asked my bff " I feel like that other girl hates me " Then she told me that the other girl told her the same stuff a few hours ago. Because of them I always feel rejected and sad all the effing time . I wonder if they talk about me or if they're my real friends . It all started back in February. Plz someone help and tell me what to do . I can tell u updates about everything . I kinda feel like they're real but at the same time no. We had a fight today cuz I ignored them ALL DAY and I stayed with my other friends . Then they asked me why I didn't stay with them but they looked happy that I wasn't with them ??? One day there was teamwork and every time im with my bff but that one time she talked to other girl to ask if she were gonna be with her . While I was asking her to be with me . They kinda also treat me like I'm their slave . Like when someone says a joke and they don't find it funny they say " don't laugh" . I scream at her " I CAN LAUGH IF I WANT I FOUND THAT JOKE FUNNY " btw the joke was about her and I laugh at pretty much everything people tell me . Thanks for your help and support. Bye love yall❤❤