You're not an object and no one is "discarding" you. People are allowed to not want to be your friend anymore. No one owes you friendships. If you feel a distance, just go find new friends. Maybe these people can feel that you feel entitled to friendships and cling to them so that you don't have to be alone, and don't actually like them as individual people. Maybe they feel that you just don't vibe with them. Either way that's their right. Maybe learn to be ok being alone without a group to surround yourself with at all times. Maybe focus on making genuine 1:1 connections with individuals based on how compatible you are instead of leaning on friend groups as a crutch.