A girl, when she talks to me, always looks serious. Why?

There are many reasons why a girl may show a serious attitude when talking to others. Here are some possible reasons:

1. She may be a serious person by nature, and her personality makes her always keep a serious attitude when communicating with others.

She may feel nervous or uncomfortable, which makes her show a serious attitude to hide her emotions.

She may be dealing with something important, which makes her feel bad, so she acts very serious.

She may have a crush on you, but she doesn't know how to express her feelings, so she is very serious.

She may have a crush on you, but she wants to keep a professional image in front of you, so she is serious.

In either case, if you want to know her thoughts and feelings better, you can find more information by communicating with her more deeply.