The pick me girl everyone hates

Hello! This is my first time on this app and I'm not sure how to use it. Does anyone have that one pick me girl that everyone hates in class? Well I will be talking about that. It all started when this one girl transferred to our school last year. Like she was quiet at first then overtime, she shows her true identity. She laughs sooo loud, judging random kids at school, starting drama with other kids, getting my friends in trouble and more. My friends were starting to hate her because of that and so they avoid her now. So like Im friends with the popular kids despite being the quiet kid, they are nice to me. So like the girl doesn't have much friends anymore and so she's hanging out with ME because she knows I'm kind and not gonna tell her to go away or anything. And even if I do, I feel bad seeing her alone☹️ my friends are telling me to tell her to stop being around me but I just can't. She also have talk shit about me before and likeee half of the school probably hates her🥹 SOOOO. What do you guys think? and what should I do