Covetous Heart

Loving someone is not easy specially when they don't feel the same.
Its like your waiting for a dead tree to be alive again,your waiting for that tree to have a green leaf and make a beautiful flowers but you know it will not.
How much pain it will cost you to love someone who loves someone else?
When will you stop waiting, hoping and wishing that maybe one of this days you will have him?
When will you say that it is time for you to step back and move on from your unrequited love?