I sympathize a lot with the song “Mr. Popular” by Double A-Ron. I had almost no friends my first two years, then suddenly half the school knew me my last two years. I still didn’t get invited to anything very often, and when I did no one actually wanted to interact with me. But people knew/thought that I was popular because tons of people would stop to say hi or whatever to me.

Edit to add: Actually in my last year there, one of my teachers had taken note of my “popularity” particularly with girls. Referred to me as a “modern day Casanova” and asked for advice on what gift to get his wife. I had had girlfriends but buying anniversary gifts for a wife was a bit out of my wheelhouse lol