I noticed my headcanon wasnt clear enough because people thought that me saying “Naruto is the only one who can get a reaction” meant the same thing as: “Itachi doesn’t exist to Sasuke and Sasuke never loved him” or something, and I need to make that clear: no, Sasuke loves Itachi as much as he loves Naruto, and more (but this is my opinion, feel free to disagree). My headcanon was based on the idea that, among the LIVING PEOPLE he interacts with, Naruto is the only one who can get a reaction. If someone talked about Itachi, Sasuke would definitely react, and even more if it was a bad thing. He is definitely a huuuuge part of Sasuke’s life, since Itachi influenced most of the things he’s ever done. Itachi is one of the most important and precious people to him, but in day-to-day reactions and current relationships, Naruto is pretty much the only one, but I didnt feel like explaining everything on that post since i felt it wasnt necessary, but I was wrong. So, sorry for not being clear enough, I guess?