dude, at the absolute max, you have 1 year to wait.... i know it sucks, but if she's that wspecial to you, and she feels the same, both of you can wait til she's 18 as well....

the other option is to have a sit down with her parents, and find out what the problem is.... if yal have been dating for a decent ammount of time, before this, the fact you're 18 really shoudln't matter.. you're the same person that you were when you were 1 day away from 18....

seems to me her parents are just looking for an excuse to seperate the two of you....