Only time will tell.

On one hand ... my grandparents married when my grandma was fourteen and my grandpa was twenty-five! They were SO in love for sixty-seven years of marriage until my grandpa died.

On the other hand ... what one wants at sixteen is usually VASTLY different from what one wants later on in life. Obviously not always, since some May-December romances last in the long run. But most of us change a LOT from sixteen to twenty, or twenty-five. My son is sixteen and there is no WAY he knows what he wants from a life-long partner. He is still so much a child in many ways.