I am Liam Payne and is she a beautiful mistake?

"Now that you can't have me, you suddenly want me. Now that I am with somebody else you tell me you love me. I slept on your door step begging for one chance, now that I've finally moved on you say that you missed me all along?" After he breaks up with his girlfriend, he isn't over her but then he finds a new girl....is she a beautiful mistake?