What do you think about the king & queen of Bhutan? They first met when she was 7 and he was 17.
He'd been so moved by her beauty and inner goodness, that he'd got down on his knees and said: "When you grow up, if I am single and not married and if you are single and not married, I would like you to be my wife, provided we still feel the same."
Then 14 years later they got married. He even gave up his right to have multiple wives.