I am in the same exact situation (28 years of age).
I suffer from shyness a little but the social anxiety that
I have is the main barrier for me. There have only been
two women in my life that I have genuinely had attraction
towards (both romantically and sexually). The latter was
a very disappointing and painful experience as I thought
this could be my chance to lose my virginity, get kissed
and have a girlfriend. Of course I do not know if it would
have worked out that way but at least back then it was some
hope on the horizon.
To all others in the same situation take solace in that their
are others like you (us), both younger and older.
Everybody has their life story so you shouldn't compare yourself to others.
Easier said then done, I know!