This is hard, and it's about you needing connections, friends, social interactions and fun!

This kind of thing can happen at any age, even retirees face the loss of friends moving, their social world changing.

I agree that while it is so nice to still have contact online, it doesn't compare to the real thing and can leave a person feeling loss and loneliness.

There is only one thing to do, and that is to find new activities and groups to join and new connections and friends, just as your friends have had to do to cope with the losses they have faced from moving, etc. It sounds like they are missing you too, but at the same time they are building a new life too.