According to Paula, the way he treats his girlfriend is better than the way he treated her. Paula says throughout the first and second verses that she's not jealous, but overall she really is aware of the changes, and really wants what her ex-boyfriend is giving to the other girl.
Paula claims that the way this man treats his girlfriend is superior to how he treated her. Throughout both verses, Paula states that she isn't jealous, yet she is indeed conscious of the changes and deeply wants what her ex-boyfriend provides to the other woman.