It is a bitter sweet pain that a person feels when they have a love burning with such passion that is slowly dying in the shallow depths of hell. Because only when a person gives a piece of their heart and soul will they feel this pain. The pain of knowing that the person who you love so much doesn't love you any longer, but the sweetness that you will always feel when you hear their name or see their picture. It gives you a rush of love knowing that they have an impact on your heart that will always be in your heart. For if you loved them like so then they will always keep a piece of your heart. But the pieces that remain, will someday be given to another, in hopes that they don't bring you the same fate.
I don't know if this piece makes sense. It sounded good in my head.