Depending on how narrow your definition of "virgin" is, I was probably a virgin until late in my freshman year of college--so I was nearly 19. I had oral sex a few times in high school, but not often and not skillfully. It wasn't a big deal when I finally got around to it.
In my case, it helped to get out of the house, and into a dorm full of other horny, recently-liberated-from-their-families peers. But don't freak out about it. You'll be surprised by how little a difference it makes in your life once it's over.