Well as the old saying goes “Friends come and go. Enemies accumulate” But seriously it is unlikely that they are consciously avoiding you because they don’t associate themselves with people of your kind. Rather it is probably because they have moved in different way and have much less common ground with you. (out of sight out of mind)It is also very likely that they aren’t inviting you to simchos because they are scared that doing so would be rubbing in your face how they have families and you don’t (yet).
Put yourself in their shoes. Had the vision you had for yourself of torah ugedula bemakom echad,came true how often would you still be thinking about those who you knew forty years ago that didn’t make it?
When you were the one who was considered a baal kishran, and envisioned a life of torah ugedula bemakom echad,how much attention did you pay to the bochrim who found learning difficult, were not socially adept and had no friends?