This article explains how to use Instagram's Close Friends feature. Instructions apply to the mobile version of Instagram on iOS or Android.
Instagram’s Close Friends feature is a customizable list of people you most want to share your stories with. It helps you share those more intimate stories directly with only the users you consider closest to you (whether you follow them or not).
Follow these steps to create a list of close friends and add people to it.
Tap your profile picture at the bottom right of the screen.