To add people to your list for personal Story sharing, go to your profile and tap on “Close Friends” in the side menu. Only you can see your close friends list and no one can request to be added. When you add a new Story, you will see an option to either share it with everyone or only with the people on your close friends list. If someone has added you to their list, you will see a green badge when you’re viewing their stories. You’ll also see a green ring around their profile photo in the Stories tray to signify that the story has only been shared with you and a few others.