The same boy that took me to his senior prom took me to mine three years later. We're still friends to this day, twelve years after we broke up (we dated a total of 4 years, almost to the day), but I'm really glad I didn't marry him. I didn't know who I was back then, and we've turned out to be very different people. Plus, he was not LDS, which was the biggest thing. But he's still very much a small town guy--even though he left our hometown, went to college, is an engineer, he's never lived outside Illinois.
Even though I mourn the loss of that lifestyle, and how it's put me in big city after big city, I know that I'm happy where I am and he's happy where he is. I always say I chose the wrong profession, because it didn't allow me to choose a lifestyle like his, but when I look around at all that I love to do in my life, I know that's lying to myself in a way. I've become a City Girl! Augh!
On the other hand, my sister married the boy who took her to her senior prom (she started dating him the same spring I started dating Tim), and they've been married 9 years and have a 3 year old. But the cost to her was her faith; he's Methodist.
I envy that high-school sweetheart thing, but for me personally, despite the frustrations of being single in a family-oriented church, I'm having a blast with the life I've been given.