My boyfriend and I are not married, but if my parents and his parents had their way, we would be... at least in the next year or so. I don't think it's realistic at all [i'm almost 20, he's 21], even though we have been together 3 and a half years, with almost zero issues and no fighting. I want to at least finish high school [i need 10 more credits], and maybe even most of college [if I even get that far] first. By that time, I'll be 24 or so. I think I'd be okay with marriage at that age, but not any time soon!
My boyfriend's oldest brother was married when he and his girlfriend were just about to turn 20, less than a year after they met. Crazy. His next brother just got married in June, he is 25 and his wife is 22.