The narrator laments the fact that he has become a "couple" . He says that he used to be a "for fun" guy, but now he's "done for fun" , which means that he doesn't think of himself as "someone important" like his ex-boyfriend or his current lover. He's just been having sex for fun. The narrator is tired of hearing these lines already. He wants to "do it ASAP" and "before time runs out" so that he can "enjoy everything" with his lover.