Dating advice tips

Hi, i'm 21 guy, never had sex or had a girlfriend. I've tried dating sites but never had any luck with them. I met one person from there for a date but it went terribly and was really awkward. I don't even know what to do as it just get's harder as the years go by. Everyone else at work has someone or had sex and i just lie because they'll all think i'm a loser.

Do you manage to talk to girls in real life?
Ever flirted r just been sociable?
Do you ever ask anyone out?

Have you made the most of yourself?

Look at it from the girls point of view. Are you interesting, funny, good company?