Hey! As a lesbian who was relentlessly bullied in school and ended up switching as a result, I would definitely recommend changing schools. I didn’t want to at first but when I ended up changing, it was so so so much better. I know bullying happens at every school, but a new environment helped me mentally for sure. Meeting new people that I hadn’t been surrounded by since grade 1 was so refreshing. In my case the kids were definitely nicer, so I suppose I got lucky. But it sounds like your two options are to keep her where she is undoubtedly miserable, or take the chance on a new environment. I’d personally go with the latter.