Why Will NOBODY Hire Me?

i, like you am also looking for a job. although i'm 18 its no different. I've been trying to get a simple retail or clerk or assistant job for almost 3 years now. since i was 15 i searched for jobs? why they wont except certain people i truly have no idea. we look good on paper, out appearance is also good... and yet they don't want you. im astounded myself. if you find the answer to this inform me please. i feel like if someone magical just walks in and they KNOW that they want to hire them