She is using the "cheating" metaphor both to make fun of her critics, as well as to symbolize the dynamic of the relationship she has. Again she seems like she is carefree in the verses (cheating, being a bad bitch), but in the chorus you see that she really loves her boy, who walks and talks with a fire. He is emotionally distant, which makes her a sad girl. But also, the critics call her too emotional, a mess, a "sad girl," and I don't think she didn't title the song SG so as to get at the critics. You call me a sad, overemotional girl? I am one!
She is using the "cheating" metaphor both to make fun of her critics, as well as to symbolize the dynamic of the relationship she has. Again she seems like she is carefree in the verses (cheating, being a bad bitch), but in the chorus you see that she really loves her boy, who walks and talks with a fire. He is emotionally distant, which makes her a sad girl. But also, the critics call her too emotional, a mess, a "sad girl," and I don't think she didn't title the song SG so as to get at the critics. You call me a sad, overemotional girl? I am one!