This is about someone who has moved on from her last relationship, and she's telling her ex that even though he tried to replace her won't find like her. I think he was always looking for something more, or screwing her over for stupid reasons that he was looking for the perfect girl, when what they the best he'd ever find. The lines "..There's once in a lifetime, and there's once in a while, and the difference between the two is about a million miles,Oh you might get lucky, By the moon is looking up , But in the truth of the morning ,The stars will be long gone." She's saying that he can take anyone home at night but in the morning there willl be nothing like what they had. "This" is how she refers to thier relationship.
This is about someone who has moved on from her last relationship, and she's telling her ex that even though he tried to replace her won't find like her. I think he was always looking for something more, or screwing her over for stupid reasons that he was looking for the perfect girl, when what they the best he'd ever find. The lines "..There's once in a lifetime, and there's once in a while, and the difference between the two is about a million miles,Oh you might get lucky, By the moon is looking up , But in the truth of the morning ,The stars will be long gone." She's saying that he can take anyone home at night but in the morning there willl be nothing like what they had. "This" is how she refers to thier relationship.