cozy buddy
A person of the opposie sex in which you seem to have great interest in but often deny. Many people will claim that you are cozy with him/her.
Girl 1: Do you like him? You two are really cozy.
Girl 2: No. Of course not.
Girl 1: Oh, I see. He's your cozy buddy.
Girl 2: No. Of course not.
Girl 1: Oh, I see. He's your cozy buddy.