How do I let you go

How do I let you go when we have been together for so long. How do I let you go when I let you destroy me. How do I let you go when I let you bring me to a place I don't know. How do I let you go when the hurt makes me sick. How do I let you go when my heart is still with you. Tell me How to forget all the good stuff and memories we had. How do I forget everything and you. so once again How do I let you go.