Lonelyone,
It very well may be depression or it could be just the beginning. I am glad you posted you thoughts and feelings because getting them outside of you is the first step to sorting through them.
I have a husband and 2 boys (7 and 10). My husband is an only child and his mother is 78 and in a nursing home, his dad is 80 and is still functional but getting very tired. He has on aunt that is 83 and unable to drive herself anywhere due to poor eyesight. That is the extent of his family. It is sad and worriesome to think that soon he will have no family.
At the same time, my family lives about 3 hours away from me. My dad died almost 3 years ago and since then the family "SPUNK" went out the window. There is a great void without my dad around. So, I kind of connected with your feelings of loss and loneliness. I feel it too and I often think about what will it be like 5 years from now, 10....and so on. It is frightening to think about.
Hang tough and keep posting. You are on the right track by starting here.
HUGS!
yellowrose