Do you ever wonder what you were born for?

I have been wondering what my purpose is! I don't think it is ever going to come to me. The only thing I guess was to have my son's. Because having my daughter turned out disastrous for her and her children. Now my heart is broken beyond repair.
My life is lonely, sad and not fulfilling. Have not reached one of my goals.
I think I reached the best part of my life in my past.
So now I wait for the end to come.
It may be a year, or 20, just have to wait and see.
I worked hard, gave much, was always optimistic, now all I see is nothing special anymore.