From the way everyone talked about it I thought when I was 18 my pubes would double, I'd never get IDed, never get suspicious looks in a shop etc. etc.
Turns out being 18 and a half now is little different from being 17 and a half.
But seriously, OP, being 18 isn't something to aim for - because it'll happen (except in very unfortunate circumstances) - you should set targets for school work, career moves, university work, passing your driving test if you haven't already - stuff like that. Keep your chin up!