Story of the princess and the boy

Once upon a time there was a young, beautiful princess. Her duties as princess. Meets youngvboy during duties. They become good friends. She starts spending time with him in secret. They have lots of fun adventures
They grow up and she has aranged marrige she does not want. They are both up set.
They go out on one last date and promise they will be lovers in the next life. At a carnival.
Years later princess is married to prince Boy has gained fame and foutune as a merchant.
They meet at a ball and the prince she married is not having it having over heard how she talks about the merchant.
Prince confronts merchant and tries to argue. Princess gets in way and tells prince off. Merchant and princess leave to the castle plaza.
This is just an outline. I will finish it later but you can add input on what you think i can change.