Please recommend some literature works about childhood sweethearts?

It can be any of the following scenarios 1. The female protagonist hated the male protagonist at first, but the male protagonist had been silently protecting the female protagonist. The female protagonist only realized that he loved the male protagonist in the end. 2. Several childhood sweethearts grew up together, and the female protagonist was hesitant about which one she liked. It was only after the male protagonist left that she realized that she liked the male protagonist the most. 3. The male protagonist kept bullying the female protagonist, calling her stupid, but when someone else bullied the female protagonist, he would help the female protagonist. In the end, he found out that he loved the female protagonist. 4. The male protagonist and female protagonist played together since they were young. Later, due to family reasons, they were separated for a long time before they finally got together.