I know what you mean when you say that friends sort of “drop off the radar.” Recently I invited a bunch of my most-cherished, long-time friends, (that I don’t see enough, and don’t hear enough from) for what we used to call a Hen Party. It seems that they now assume that I’m unavailable, so I never get invites to the group luncheons any more. We all agreed that we need to keep closer contact, but their suggestion was that I be the “social director,” and that I be the one to make it happen. Sheesh! I am sure they don’t have a clue about how cold that seems to me.
I guess I'm better off in recluse mode anyway. I enjoy my own company, and I never get into arguments with anybody that way.