Backstabbing friends

Ok so I just need a flippin place to rant. I have a "close" group of so called "friends". Well Im sick of them. Im called an a**hole for being awkward when one of them invited some weird nasty kid ( the other two girls didn't like him either and we're mad at the one). Like SERIOUSLY then she asked WHY IM PISSED AT HER!!!!!! Like are you kidding me! And they leave me out of so much stuff. I don't know what they are doing or talking about anymore. And they look at me and laugh. I don't even know anymore. Should I leave them for others? They don't even TRY to communicate with me anymore. I'm so sick of them. I thought (let's say chip) was my best friend because of elementary School together but NO as soon as (let's say python) comes around everything is about python. And not to mention (let's say pineapple). Pineapple walked off with chip the other day and didn't say anything. I ask chip about it and she goes " why are you so pissed. You should be happy for me. I got a purple (another name)". LIKE ARE YOU KIDDING ME! YOU LEFT ME ALONE WITH 1 OTHER PERSON FOR 45 MINUTES! ( We were short staffed at a large event and needed help so this wasn't good) I CANT BELIEVE THOSE BACKSTABBING girls. I don't even care anymore and are migrating to others. What should I do? Should I stay or migrate I need help? Thanks!

I feel so relieved now. I so wanted to cry and punch pillows.

Pineapple, chip, python and I are friends