Most people will tell you it's not likely. However I am here to tell you yes it can happen. I have been with my husband since we were 16. Nobody ever thought we would make it and most were not shy in telling us so. But it has been 21 years and neither of us are going anywhere. He is my Yang to my Yin. Lol! We have proven all of them wrong. And the funny thing is.... Is that MOST of them didn't last in OUR lives! We are better off without them. But I digress. I want to encourage you that yes it CAN happen even though the odds are against you. Just prepare both of your hearts for "growing pains" as each of you grow up and mature. This is also the stage most separate because once you guys discover who you both are individually a lot of times the couple has gone separate ways. But couple do survive. Good luck to the both of you.
It can happen, my friend's oldest sister started dating her boyfriend when she was 11, he was 17.. She's now 27 and he's 33- got married a couple of years ago, and had their first baby not long ago.