The absence of a companion and the absence of a son is the most painful thing for many lonely old people. There is no companion and no child to take care of. It should be very helpless for the elderly. I think you have two options.
The first one is to move to a nursing home, because the biggest fear of the elderly is loneliness, but you won't feel that way there. Because there, you will have very many old pals of the same age to have fun with, chatting with them every day, exercising a bit, and living a very full life. So many old friends together, who if something happens, there is still a care. And there are food and play, there will be someone to take care of your food and living, when your son is free, come back to see you, and you will not disturb their lives, to avoid conflicts.
The second option is to find an old partner, which should not be difficult. Two people live together, support each other, care for each other, because what you lack the most is companionship, and your son, he is working abroad, can not often come home to see you. It is not possible to give up his work in the field just because he wants to accompany you. So it is a very good choice to find an old companion to live with. As long as the interests are similar, two people can keep each other company and talk when they have nothing to do. Two people are always happier than one person, are just to spend their old age. However, this is still to seek the consent of the children of the two elderly, generally children are willing, because they can not take care of their parents, always hope that there will be another person to take care of them. If you find an elderly companion, this person will be able to accompany you instead of your son. No matter what, you need a companion to spend your old age in peace.