Interestingly, my wife was speaking with our student's liaison about how we were doing since our student had been gone. In response, my wife said "it feels like someone died." Could it be that we are experiencing the same thing as a returning student? If so, how is that possible. We went nowhere new. We still had a familiar culture around us, with family, with jobs, and with our own popular culture. And yet the fact is, we were having the same symptoms as a returning student.
So here is my hypothesis; because we are childless and both in our forties in age, we were, in effect, living in a different culture before our AFS student came into our lives. As time went on, we were exposed to a completely foreign culture for us. That is, high school dances, sports, plays, concerts, picking up the child, delivering the child, meeting new parents of friends of our daughter, and on and on. We experienced the same level of change, in the most important ways (i.e., our daily routine) as our AFS daughter. And so, when she left to go home, not only did she leave us without her in person and spirit in our house, she closed the door behind her to the new culture we had experienced as a result of having her part of our life.
Therefore it should be no surprise that we are having difficulty adjusting back to our "old" culture. And in fact, we are not at all happy with being back where we were before she came
Just a theory. But it explains our deep feelings of loss and sense of isolation. Knowledge and understanding are the first steps in dealing with our problems. And at least I have some grasp of just what the heck happened to us. I am feeling a bit better and am able to see the happy parts of our experience rather than only mourning their passing. Hope this helps you too.