fear of being alone forever

i’m only 18, turning 19 in five months. i have this scary feeling in the back of my mind that i will never find my soulmate or be able to start a family. i’ve had relationships before but they all end badly. i feel like i have the worst luck with guys because almost all of them are complete assholes! i know i have my whole life ahead of me but i can’t stop thinking about how lonely i am. i want to have a family so bad one day and i can’t do that if i can’t even find a boyfriend. i just want to find somebody to enjoy life with.