VELMA: My best girl friend is a Mexican girl. Every time I go up on the second floor where the Negroes hang out and I'm with this girl, they're always saying things like, "Hey girl, you're out of your place with her." Well, I don't listen to them at all.

He is not deeply worried about dope, because he trusts Sharon, knows she is sensible; that she tried cigarettes with her girl friends because at thirteen she wouldn't think of death […]

Then, the lady explained that her husband often talked to his girl friend about her.

1958, DC Comics, Superman's Girl Friend Lois Lane:

You may talk about different things with your girl friend than you do with your guy friends.

Girl friend

Meaning

Noun