If our life is lonely, it seems to be a sad thing and no one likes to live at such kind of life. But considering deeply, lonely is a road which we have to pass in the journey of our life.
When you are young, you will not be lonely because at this age, you can easily find friends and relations to fool around together at any time and any occasion. But, once you get old, people will not like to be together with you and slowly you will go to live a lonely life which is a general case for every old people.
Therefore, loneliness is a normal and natural thing for every old man. What you can do is how to find your happiness from loneliness, and how to arrange your life by yourself.
Once a person gets into adulthood, he or she will marry to build a family. Loneliness will not exist, but instead he will be too busy to handle his life.
When time goes by, you will be old and your companion will leave the world before you go to heaven. You may have children to accompany you. And when they grow up, they also will leave you and go away for various reasons, such as marriage, work and so on. You will then be lonely in a true sense.
Loneliness is not very serious, but you must have good health, without which you are indeed to suffer your life in old days.