I need some advice- its about a friend I've had since i was in primary. I don't want to be friends with her because shes toxic. All I do with her is talk bad about others and she makes fun of people for doing things they might enjoy.Not to mention our personalities are completely different and we have different interests. I dont enjoy hanging out with her anymore and i want to cut her off but i see her in all of my lessons during school and she lives in the same community(basically i cant escape her until im done with my a levels and im in yr 12)- not to mention our parents are close and at gatherings or family parties, shes always there. Thing is, when other people are around, I feel as if i'm the last priority. We have another close family friend a year younger than us and when we're together she'll often walk right next to her and talk to her mainly and would often say "X come with me i need to go bathroom,come with me i need to get more food" and i feel left out. My mum told me not to cut her off as she'll never leave me alone(which is true tbh). Instead she said i should stand up for myself and tell her, but the thing is 1.im not confident and 2. this girl would make the biggest deal and would tell other people abt how i said smth to her- she'd get annoyed and would start showing attitude.shes also having problems with her main friend in school so keeps following me around during break and tries to hangout with my friends which does annoy me as everyone thinks she is so fun and hilarious(which is true to an extent don't get me wrong) but ive seen her other side which others don't see and i don't want to friends with her. What should i do?