I don't have any good advice on growing facial hair, probably just wait it out and your day will come (and sooner than later you'll hate it like everybody else too).
I will say one thing though, nothing looks dumber than a kid who can't grow facial hair, who's actually trying to sport some facial hair.
For example: patchy beards, the skinny line thing that has all the gaps, the mustache that's really made up of seven black hairs and some peach fuzz, the sideburns that in no way match the hair on the head, etc.
Although we were all probably guilty of one or more of these in high school, the fact remains that these are all bad ideas, and you'll never get laid if you were crappy lokking facial hair. At least you have the sense to "scrape off" those few hairs on your chin and not grow it out and refer to it as "my goatee"
Congrats bro on not being that guy, and see a doctor if you're that worried about growing some face fuzz. You should probably just settle for the "clean" look for now.