As I've told my 30-something kids, "I will always be your mother, and you are always going to hear my opinion." It's gratifying if they take it to heart, but I don't worry if they don't. I know it's their life, but it's my job to "constructively advise" them. I know it sounds like nagging, and maybe it is, but it's usually meant for your own good. She probably still sees you as her little girl. Moving out is a good way to not have to listen to it all the time.