advice/need someone to talk to

i need advice on what i should do. so i'm 15 and obviosuly high school is full of drama but i have a really low self esteem and i take things really seriosuky. basically my friends said they wanted a break from hanging with me and then when i hung with less popular people they like made fun of that. all of lunch today i sat in the toilet cos i feel lonely and i need someone to talk to but i feel like no one is here. i came onto here for advice to

- become more confident and love myself more

- focus more on what matters

- learn how to manage my emotions more

i dontknow if anyone could help but it's worth a try