Hi,
I too have not (voluntarily) had sex, done drugs or hell even smoked a cigarette. I went to a bar once in college, had 1/2 a drink and went back to class.
I enjoyed reading the philosophies/beliefs in your post although I don't agree with the conclusions (your being worthless) that you have drawn.
I am going to take the liberty to change up your question a bit (I'm just arrogant like that, nothing personal). Anyway... changing it to "what is the meaning of MY life" as I think the answer is different for everyone.
I do believe a lot of people have become complacent and live only the life you talk of in your post. I am not currently able to work (don't worry... no sob story ahead) so work can't be the meaning of my life. I have a special needs child I adopted who takes the majority of my time and energy and provides significant mental stimulus... I don't however believe it is fair to ask a 12yr old to provide meaning to my life. I have pets, no meaning there... mostly a can opener. I have hobbies but am often not well enough to enjoy them.
So... being the pain in the a* philosopher that I am it leaves me with questions...

1. Is the meaning of life something that comes from within us or from outside of us
2. What truly is "meaningful" in a reality where everything/ every one has a time then it passes... often into a mostly forgotten void.
3. What is the importance of meaning.

Then, the whole love thing... well personally I don't think love and meaning are connected... and, with my ramblings that would be a whole new thread... but I am happy to go there with you as well if you'd like.

No, I am not being a smart a*... just an arrogant philosopher... though there may not be much difference.