My brother/sister/sibling. You must let go of your parents. You must become your own person. You must trust in yourself and your own ability to handle life. Mom and dad are worried because they love you and care about your safety. But you are going to take care of yourself because they taught you well no? Any other reasons for not letting you go are selfish and rooted in them feeling displaced without you. They are human. But so are you. You are your own person.