Thank you guys! The song was written when my first wife unexpectedly left me and my two-year-old son, and disappeared for a couple of years, without explanation.
There is good news though. It eventually turned out that she had developed a toxic goiter, that affected her thyroid gland and, among other symptoms, caused a personality change. After successful surgery and treatment she returned to "normal", but by then it was too late for a reconciliation. We do remain friends and have a son and two grandsons in common.
And, if this hadn't happened I would not have my "current" family, with which I've blessed to have for 38 years now!
I think the song is written so it fits a number of situations, and my intent is not to bring sadness, to express a great sense of loss.
You all are very kind to make such great comments and I appreciate not only your listening but your great friendship over all these years.
Merry Christmas to all!