Friends😢

I'm a boarder in year 9 and my friend group is made up of 3 people (including me), Bella(one of the girls) and I weren't really getting along but it was nothing major and well the other girl renae has escalated everything saying I'm a 'selfish prick' that 'I always blame them' and she said she didn't want to be friends anymore and I didn't even do anything like I'm so confused and I was hanging out with other girls but because my year level at school is so small everyone hates me. They have been spreading so many rumours about me that are not true! I know I should just ignore it but it's one of the hardest things to do. Nothing is going to fix the way they are behaving and I just want to change schools