A few beautifully wise sentences put in simple words in a blog comment I came across.. and are relevant in every situation in life where we need to let go of someone, or something, or sometimes our old miserable selves!

"After you go through the motions of losing someone, like crying all the time, keeping yourself busy, talking to family and friends etc. You must forgive. Forgiveness is letting go of your resentment, disappointment, anger and hurt. When you do, you are free from these prisons. They no longer captivate your attention. They no longer intrude on your thoughts and your sleep. You are no longer steeped in anger and righteous indignation. You no longer feel the need to convince others that you have been wronged. You give up being a victim and step into a lighter, less restricted consciousness.
Forgiveness is self-healing. Before you forgive, you are fixated on what has not gone the way that you wanted it to go. Not forgiving is holding on to what you once had. Forgiving is releasing them. Let it go...."

--Random blog comment