Letting go of something you have loved is an act of courage. It takes courage to let go of what you have loved because there are no guarantees that something new to love will come in. Yet, if you cling to what needs to go, you have not made room for the new.
A favorite image of mine is that of a monkey who has both hands in jars. Each hand is full of a treat the monkey can have, but to get that treat the monkey has to let go of some of the treats. I have heard that a monkey will not let go and will remain there with its hands stuck in the jars. Whether this is true of not, I do not know, but the image fits human nature. How often do we cling to what we know we need to let go!
Holding onto something becomes a prison; it traps the one who is clinging.