Omfg I’m just done at this point...

So at the beginning of the school year I didn’t have many friends besides my best friend. My best friend invited me to sit with them. That happened in August, it’s February now and a lot of drama went down. Theres this one girl in the group who’s a bitch and we were thinking about asking her to leave. We all agreed and yesterday we told her. Then This text went out in the group chat last night.

I can’t sit with her anymore she’s to toxic and the others don’t care. I want to move on but my only problem is that my best friend sits with them and she agrees with me that she’s toxic but the other people are her friends so she won’t leave. I won’t have anybody else to sit with and now I won’t get to see my best friend a lot anymore. Help! What should I do?