I don't know how to find a girl or how to make one like me?

i am 2 months away from being 20 years old. and i haven't even touched a girl outside my family. and it's certainly not beacuse im shy. when i was in high school. all the girls were repulsed by me for some reason. i don 't know why. was it beacuse im ugly or am i a horrible person. i don't get it i was always so nice to everyone especially girls i liked. now im not in school and i have no way of meeting girls. when i was still in high school i just wanted to get laid. but now i feel i am matureing to the point to where i want a meaningfull realationship. I have felt so lonely and i don't know how to solve my problem