i let people use me and i need help

so i'm 15 years old , female . i lost my virginity a month ago and i feel so dumb because i wasn't emotionally connected with the guy , i just wanted to be able to say i wasn't a virgin bc all my friends lost theirs before me. since then people heard that i was "easy" and started hitting me up asking for sex etc. and ik i need to stop but i can't say no even though i don't want it because i want them to like me. i just want to be happy