Bestfriend weird energy

Me and my bestfriend are insanely close, and we have been for a while now. The friendgroup i’m currently in at college is not very nice to me & singles me out as well as that one of the girls there i’ve had a huge falling out with due to her spreading rumours behind my back. My bestfriend knows this and doesn’t even go to the school we all go to infact IM the one that introduced her to them all.

Everyday friday we host something at someone’s house and this time it’s the girl who did me dirty, my bestfriend said she wasn’t going to go and i even expressed to her i don’t want to be friends with these guys anymore— and then today aka Friday i checked her location and she’s there. at her house?!

I don’t know if this is actually that bad and wondering what people are thinking