The narrator reflects on how the guy who had kissed her recently is no longer the same person she once knew. Despite rejecting him and feeling no ownership over him, she still feels the sting of loss. She misses the Richie who used to be sweet and infatuated with her, implying a sense of longing for the past connection they shared.
"The guy who'd kissed me last week—that guy was gone." This line highlights her sadness and the change she perceives in Richie. The emotional distance and the shift in their relationship leave her recalling the Richie who used to care, emphasizing her unresolved feelings and the pain of losing what once was.