I feel betrayed by my used to be best friends :(

We started to talk again last year after an argument that we had going on for a year, it felt perfect to be friends again but pretty soon it broke down.

After we separated I started to feel really lonely, I tried to make new friends but I still missed our old friendship. So somehow we started to talk again and it was amazing there was five of us 2 best friends and another 2 best friends and I was practically he third wheel, I talked with both of the duos. One girl tried really hard to go and replace me, I tried to be nice to her but she wasn't really nice to me so I decided to just ignore that she's there and after a while she stopped, our group started to back talk her calling her annoying and a fat loser, I was scared that they thought the same about me but I just decided that my "friends" wouldn't do that. How stupid was I... Well when I hanged out whit one of the duos they were always back talking the other one calling the other duo jealous, copies, idiots and the list goes on. I thought that I was safe but I wasn't. After a while I told the other duo what the other was doing and I regret it, after some time the duo stopped liking me and told the other one that I told them about the back talking and that they don't believe me. So I had both duos against me. At that time I didn't have much friends so I just broke down and cried.

Coming back to this year, I sat in front of one of the duos. I didn't want to but other seats were taken so I didn't have much of a choice. We kinda started to talk but I made sure to stay my distance. At the start of the school year a new girl went into our class, I started to talk to her and after a while we became friends. We always talked about music, TikTok trends and made jokes, after new year's we were basically best friends. But then we started to talk to the duos from last year again, nothing too crazy. We played some games and chatted. And I slowly started to be friends with them again, for about four months it was great we all made joke, we recorded videos and we genuinely had fun but then the girl that tried to replace me last year came back. I was sick and then went on a vacation so about for a month I missed a lot of school meanwhile my used to be best friend became more close with the other girl, they went to the cinema, they had a sleep over... When I came back from the vacation I saw the mood just change. My used to be best friend was unresponsive, always grumpy, didn't want to go out and one day I got mad at her for not working in a group project we had and the next day she just decided to be best friends with the other girl instead and because of how much our friend group depended on each other the other girl completely replaced me.

And that's it that's how our the story of me and my friend group ended...

Well but anyway I hope

you have a nice day. :3