I didn't date in high school. I was kind of depressed and emo-ish. Not in the cry for attention sort of way, but just that I kept to myself mostly and wasn't particularly happy. Either way, girls in high school don't exactly tend to go dreamy-eyed over a guy like that.
So a bit of a later start than most, I'd say, but I was 18 before I started getting into the dating thing, and 20 before my first REAL relationship (lasted over 3 years, we lived together for a while, etc.)