In high school, all the female students didn't know each other. Recently, a female classmate often glances at me in class What does she mean by telling jokes and smiling at me?

... she should have a strange feeling about you. High school is the climax of youth. You think she's nice, just make a girlfriend. However, if she just wants to make friends with you normally, you will be called romantic, so I suggest that you can't take the initiative in this kind of thing.