Seriously? You probably have lots of friends. I remember them all, even my classmates that are so freaking loud and even teachers that I have one-sided beef with lmao.
I am just bad at remembering people generally. I have to force myself (study?) if I want to remember face and name of someone. Even if I learn, I forgot people I am not so close after some years. That's why I don't remember most. For example high school, I remember my best friends and some of my classmates I talked. I don't remember my other classmates but if I saw them again even if I don't know their name I can recognize them little like "Yes I was in same class with this person." . But I don't remember others. Like people from other classes, or my seniors or juniors. Even people I went to abroad together with school, it was my first time going to abroad so it was exciting memory but I don't remember people I went togheter (students and teachers). I think remembering people also is talent.
I remember the ones from university less than the ones from high school. Because of covid, 1.5 year of my university was online. I forgot most people's faces and names in this process. I don't remember the names of any of my teachers. I remember about 5 of my department friends and I don't remember rest. I probably can't even recognize people I was in same classes. It was a 4-year university department.
I also don't remember most of my highschool friends also middle school friends or primary school friends and also I don't remember most of my university friends. I only remember few people that I was close. I always wondered how some people remember everyone lol (I don't remember most of my teachers too)