A person can have hundreds of friends yet still feel lonely if the relationship with each of them was superficial. Loneliness can be eliminated if a person maintained high quality relationships with few people. A high quality relationship refers to strong friendship and not superficial relations.
A person who shares his deep secrets, his fears, his true emotions and exposes his true self his close friends can hardly experience loneliness. The type of emotional connection that is created when someone exposes himself to close ones ends loneliness.
Humans are social beings. We need to share our good experiences with others in order to enjoy them more and we need to share the bad ones to feel better about them. Spending too much time in isolation can lead to loneliness (See why do humans join groups).
Many people don't share their emotions with others out of the fear of embarrassment or because of their insecurities. Learning how to get over those obstacles is one sure way to end loneliness.
A person can have lots of friends yet still feel lonely if he felt that he is misunderstood. Once a person manages to find someone who thinks like him that person can person be less lonely. To end loneliness a person should scout for the ones who think like him.
Some people feel lonely because they don't have close friends or because they don't have friends who share their same interest. By expanding his social circle a person can increase his chance of finding people who share his same interests and so he can end loneliness.
A person who loves Photography can join a Photography group to end loneliness. By doing so that person will increase his chance of finding someone who shares his same interests.
Many people do the mistake of reducing the contact with their close friends. If it happened that those people broke up they usually feel extremely lonely because they drifted away from their close friends.
A person can feel less lonely by involving his friends in some of his daily activities when possible. A person can walk with a friend, exercise with him or study with a group to combat loneliness.
Group activities can reduce loneliness a great deal. If a person volunteered with others to achieve a certain objective then his loneliness will get reduced. The fact that the person shares a common goal with others can help him feel less lonely.
A person can be single and not feel lonely if he had close intimate friends. A relationship can help a great deal in ending loneliness but still it's not a must.
Some people fail to make friends or communicate intimately with them because they lack the needed social skills. In such a case improving one's communication skills is an essential step required for ending loneliness.
Many people mistakenly think that they can use social networks to end loneliness but according to researchers people who spend more time on social networks didn't feel any better about their loneliness (See why Facebook is addictive).
A person can reduce loneliness a great deal by meeting his close friend(s) once a day if possible. By ensuring that his friends are constantly updated with his news and feelings that person can feel much less lonely.