To me, skyscraper is a song about not giving. So basically demi is saying "you can say what you want, but it wont affect me, " "you are the lesser person, you must be so insecure if my pain makes you happy" "so you know what, i'm just gonna ignore it, i wont fuel your flame" just don't let anyone or anything stand in your way, emotionally and physically (:
(btw. I dint copy this. I made it. And then made a profile so yeah).