I hate my friends and I regret creating my friend group

For context, I (19F) have had my friend group since I was about 14-15, which started with me introducing everyone to each other — we’ve been friends for a good while. Recently though, theyve been acting so weird. They avoid making contact with me but constantly reach out to my boyfriend to ask him things ABOUT me, which I have tried to talk to them about, but they always ignore my messages and if I say it in person when I see them on campus they just avoid the topic. I will be using fake names for the sake of my privacy. My friend group has a dynamic where everyone has their own duo. I used to be a duo with Mia (19F) but she recently has stopped texting me, or even talking to me in general unless she needs something from me or she wants to rant. She stopped being my duo and joined a trio with my boyfriend Ethan (19M) and our other friend Joseph (19M). It’s not that I’m mad at her for ditching me, I’m upset because she doesn’t try to maintain our friendship despite telling people that I’m her best friend of 4 years. What kind of was my last straw was one time that I spent 4 hours making a cake for our upcoming friendship anniversary (we were all going to hang out at Mia’s house that day), and when I brought the cake, everyone laughed at it and said it was the dumbest thing they had ever seen and refused to eat it. I confronted them and asked why they wouldn’t eat anything I ever brought if it wasn’t storebought but would eat anything Joseph brought no matter how bad it tasted, and everyone just got mad at me and said I need to control my anger issues and to “shut the fuck up every once in a while”, then ignored me for the rest of the day. I know this sounds like middle school drama type of shit but I’ve tried so hard so many times to maturely have talks with them instead of bottling it up, but I think I’m done. They never want to cooperate, they never want to try and make the friendship work. They literally only want my boyfriend in the group. He has tried defending me when they start insulting me, they only stop when he tells them to. It’s annoying as hell and I’m so tired of it. Theyve reduced me from being everyone’s friend, my own person, to just “Ethan’s gf” I know they’ve talked trash about me, likely even to him, and I don’t care. I don’t care what they think anymore. I want to get out but I just don’t know how to end it/leave the friend group since my bf is still in it. Hopefully I find a way out. I don’t care if he stays friends with them, it’s his decision on whether or not he’ll continue being friends with them once I leave. Sorry for the long rant, I just don’t have anyone to talk to