Why do girls tell boys who like them that they have boyfriends?

I think there are the following reasons:

1. She doesn't like the boy who asked her this question, which is equivalent to rejecting him.

Your relationship is not deep enough for her to open her heart to you and tell you her emotional experience, and she doesn't want you to misunderstand her.

Girls have vanity, and no one wants others to think that they are unwelcome leftover women.

She lied deliberately.

She said it casually and didn't even think about it.

6. If she doesn't want to talk to you, she will perfunctory you.

Hehe, good luck.