Girls Best Friend- someone who hangs around girls, wanting more than just friendship but ultimately is nothing more than a shoulder to cry on. More often than not are virgins and are known to dob on cheaters and players in a feeble attempt to get some.
Brett: Why did you say that shit to Bec. You know it had nothing to do to you.
Harry: I swear I didn't say anything. You shouldn't treat girls like that anyway.
Brett: Your never going to be anything more than a GBF.