Two-Way Crush

Looking for a Book About a Male and Female Protagonist Who Have a Secret Love for Each Other?

The male protagonist seems to be named Xie, and the female protagonist seems to be named Xia. The male and female protagonists had a crush on each other in school, but they separated after graduation. The female protagonist met the male protagonist again on a blind date, and finally got together. The female protagonist is a cartoonist. She bought the physical book in the second grade of junior high school and liked it very much. Now she has finished high school and can't find it.