I think it's something along the lines of mmnts_frver_fded's cases. This song is about a girl and a guy, and the girl really loved the guy but the guy wasn't as into the relationship as she was. Eventually the girl went 'on to someone new' and I think at that point the guy realized that he really did care about her more than he initially let on, but he just took what he had before for granted. So now the guy wants another chance with the girl to prove that he really does care.
I think it's something along the lines of mmnts_frver_fded's cases. This song is about a girl and a guy, and the girl really loved the guy but the guy wasn't as into the relationship as she was. Eventually the girl went 'on to someone new' and I think at that point the guy realized that he really did care about her more than he initially let on, but he just took what he had before for granted. So now the guy wants another chance with the girl to prove that he really does care.