This song is about how at first, when she started dating the guy, eh really wanted to impress her, so he was buying her stuff, and taking care of her. Then, he stopped trying to impress her, and started getting too comfortable with her, and stopped taking care of her. So, she's asking why he stopped, and whether he's really as great as he appeared to be in the beginning.. which he definitely isn't.
This song is about how at first, when she started dating the guy, eh really wanted to impress her, so he was buying her stuff, and taking care of her. Then, he stopped trying to impress her, and started getting too comfortable with her, and stopped taking care of her. So, she's asking why he stopped, and whether he's really as great as he appeared to be in the beginning.. which he definitely isn't.
I really like this song... mostly Destiny's Child in Beyoncé in general.