I have thought about this exact thing many times. I must admit, it is wonderful having friends outside the WTS who will be there regardless of whether I go to meetings or not, and that I can be myself around them.
One thing I have to remind myself, is that close friends that I had during the WTS time, some of them were true friends. But, they have the WTS to answer up to. Remember, they feel as though the WTS is God talking, and when the WTS says that you cannot associate with the df'd or da'd ones, they really believe that is what God wants. And that scares them into doing what the WTS says to do.
Many of our friends, who really were friends, did, and do still care. They just feel as though they cannot do anything about it. Because of that, I do not judge them. I hope one day that they will see the light. Until then, not so much I can do.