My biggest regret and failure

I'm 27 still a virgin never had a girlfriend or even kissed a girl. I wasted my youth. I wasted my life. I can't help but feel like it's over for me. All I've ever wanted for all my life, was a girlfriend and to experience love, sex, cuddles, kisses, etc. All that good stuff, but girls were never really attracted to me. Even going back to high school. I had female friends, but none of them felt attracted to me that way. I missed out on young love and late teenager nights. I barely ever went out because I hated myself and had no confidence. I think about what my life would be like even if I just had one girlfriend in my late teens/early 20's. I would definitely have more confidence and swagger about me for sure, but it never happened. I'm full of regret. This one thing is holding me back in life. I feel like until I experience it.....IF I ever do, but time is running out. When I turn 28 next year, I wanna live like I'm 18 again. I wanna do all these things like I'm 18. I wanna hook up and have late nights like a teenager. I have a babyface that still makes me look 19/20 so maybe I can pull it off. I don't care what anyone thinks. Call me immature or whatever I don't care. I wanna live like I'm 18 and have the ''youth'' I never had