I think this song is about those great relationships that you have that end peacefully, but every now and then you think to yourself that you wish you could have done things differently because everyone that you date doesn't compare to that great love you once had. She is basically saying that even though she ended things everything she felt for him still remains and she wishes she could change things. When she ses i shouldn't be telling you i think she is saying that because the guys is now in a relationship but she still hasn't let go, so deep down she is hoping that he still feels the same. I especially love the bit 'i've tried to erase the way your kisses taste, but some things are girl can never forget'.
I think this song is about those great relationships that you have that end peacefully, but every now and then you think to yourself that you wish you could have done things differently because everyone that you date doesn't compare to that great love you once had. She is basically saying that even though she ended things everything she felt for him still remains and she wishes she could change things. When she ses i shouldn't be telling you i think she is saying that because the guys is now in a relationship but she still hasn't let go, so deep down she is hoping that he still feels the same. I especially love the bit 'i've tried to erase the way your kisses taste, but some things are girl can never forget'.