What is meant by loneliness? Is it different to be alone than to feel alone? Have you felt sadness, misunderstanding, lack of pleasant moments or have you been rejected? Perhaps the lack of security and the fear of abandonment have taken over you. Knowing the causes of loneliness is clarifying its origin... and being able to act on it. It's not easy, but there are strategies to overcome the feeling of being lonely in the world. Think that it is not good to get used to being alone, because we are social beings, nor to have calamitous thoughts, since anxiety, anguish and depression affect us physically as well as emotionally. This book is for those who consider "company with others" the recipe for happiness; but they find themselves stranded in the impotence of concretizing healthy relationships. Loneliness is neither good nor bad in itself, but it generates positive or negative feelings in us according to how we approach it. It is up to you to use the advice that psychology has developed for a full life and that are developed here.