Boys worry about girls' health everywhere, remind her not to be cheated, think about her everywhere, worry about her, and stop her from contacting other boys.

This shows that he loves her, and every man will take good care of the people he loves. This is a man's nature. People without this character are not men. This ubiquitous concern and worry about her is a man's true love for his woman. When a girl marries, she must marry a man who can take care of herself all her life.