Why do I feel like people hate me all the time? Am i paranoid?

My mum thinks i'm paranoid, because wherever i go i think people don't want me there, i always think my friends are using me for something else, that boys only want to talk to me for sex, that everyones secretly thinking "oh someone shut her up" I always think people have negative thoughts about me, even if they don't know me or I haven't done anything wrong.