Loneliness is a state of mind where an individual feel alone. Loneliness does not arise from being alone with ourselves however, it emerges when we crave for more recognition and in process feel isolated.
Given a deep dive to the of reason feeling lonely, one can easily conclude that a human being feel loneliness to themselves because they do not want other people to curtail their desire or to put any kind of roadblocks from doing what they want. The first person in line of defending us starts from the family itself. As we do not want our family members to intervene into our life as we do not want them to correct us or find any mistake.
Slowly we tend to shrink into a smaller unit although somewhere at deep subconscious level we long for a sense of community and togetherness.
Fear of rejection, disappointment, or any kind of criticism should not deprive us from getting into other's company. It is in human nature that not everyone will be at same page all the time, however we need to change our approach and start accepting diffetent viewpoints of the society.
Once a person get into the loneliness block, it is hard to pull him back. But not impossible.
As always said , prevention is better than cure. To make people life more easier, and helping them coming out from state of loneliness, firstly try to make them go out into nature. Going out into open and feel the harmony and onenesd. Enjoy the life and the beauty that nature has given us. Feel the sense of oneness with the plants,winds,birds etc. The mind will become quit and feel serene peace. Sooner, it stimulates a sense of togetherness and start feeling to be loved and protected.
Second way of getting over the loneliness doldrums, is to reach out to the people. And actively start contacting people whom you know. The best way is to look out for some elder senior citizen and get in touch with them. They are actually that part of society, who always seek company. By having them around not only help them to be loved, but in process you getting to talk to someone more experienced and derive some life knowledge. Which further helps you to garner more life understanding.
It is always good to reach out to people, call them, give a sympathetic ear. By doing that , you are doing good for yourself, as you are killing your own loneliness. Untill we do not link our hearts with other, untill we are not ready to connect we will always besieged by loneliness.
As said, "be like a flower, share your fragrance and beauty with the world". The more we share the more it do good to us and in return garner more praise and appreciation.
All around us is the cosmic game. The universe is full of joy,inner and outer. When realisation takes place, we have to feel the necessity of manifesting this constant delight in our heart. The delight glows but does not burn. It has tremendous intensity but it is all softness. - Sri Chinmoy
Loneliness is just a negative mental attitude. The best way is to look out for people and try to do something good for others. Loneliness will never comes to haunt us.
Namaste 
