This song is about someone who lost the one person that means the most to them in the world. At one point it says I'd sacrifice my beating heart before I lose you I still hold onto the letters you returned I swear I've lived and learned' which I think means that this person has learned from what they have done to make his love leave and that they would give anything to bewith then again. I really agree with this song because I am in a similarsitiation and girl I love is one of my best friends and going out with another person but I cantget over her.