Well first off you need to speak up for yourself and not back down. You can do this respectfully. When someone feels the need to over-manage your life you're the only one that can fight it. you have to stand up and speak out about this. telling them that if they dont' allow you to make any decision how are they going to know that you even can make good ones? If you have a therapist I would say maybe talking tot hem about how learning how to assert yourself more with your parents