I didn't meet my "sweetheart" until after high school so... no. My high school relationships were few and short.
I'd say for the most part, high school is a very bad, if not the worst, place to look for a soul mate. You're young, you don't know what you want yet (even if you think you do), and most likely you'll do and say stupid things that make you cringe a few years later. You're still growing... and need time to fully mature before you know what you want from yourself, let alone a mate. Besides, with school and homework, friends and family, you have more important things to focus on.
I'd say for the most part, high school is a very bad, if not the worst, place to look for a soul mate. You're young, you don't know what you want yet (even if you think you do), and most likely you'll do and say stupid things that make you cringe a few years later. You're still growing... and need time to fully mature before you know what you want from yourself, let alone a mate. Besides, with school and homework, friends and family, you have more important things to focus on.