Situation About A Friend

Hi, I am currently going through issues with a friend and I need advice and consolation. So basically, I was friends with a girl and we were friends for a year. We met at school for my ninth grade year. She was really kind to me and we would talk, but something changed for some reason and she started to become kinda cold towards me. I am not sure what happened. She didn’t allow me to do things that she would allow my other friends to do and she didn’t want to hang out with me anymore, but would want to hang out with everyone else. Summer came and everything was fine, but she started to distance herself from me and even blocked me on social media. She started to become more active in the friend group that we are all in and I feel like things aren’t the same or aren’t going to work out in the group anymore with me and everything. I left the group chat today and I asked to speak with one of the friends in my friend group who I talk to a lot later today. I don’t know if this is the right move but earlier this morning I couldn’t breathe because of the whole situation. I feel like an oddball in the group and I feel like this conflict will cause a rift in the friend group. I feel really sad and overwhelmed right now because she kicked me out of her life without telling me anything or trying to reconcile or telling me about what I did wrong so I can improve myself in the future. Me and two other friends in the group are sharing a big room and they were planning to hang out there but idk with this whole friendship issue how it will go. I was invited to play a game with my friends over call during the summer and the girl was in there but she completely pretended like when I was there and when she did say one line about me she said it in a weird tone mentioning my name. I don’t know how to feel because I have been trying to be a good friend but I don’t know what my next steps should be or how I should approach the situation or how I can continue to go on without this friendship if I am still in the friend group.