Why to be lonely

World is full of sufferings. Look around you, everything pretty much messed up. And all of this is happening because of human nature. Human tends to do anything for himself, he can even harm others , atleast for surviving, So whats the best way for ending sufferings. In my view the only thing except meditation is being lonely. Sun shines so brightly only because it is alone. We sometimes make bad decisions for our loved ones which inturn harms us. Let me give here an example from my life. I learned there are no good friends or bad friends, there are just friends. And they undoubtly cheat you no matter how close they are to you. Atleast for surviving your closest person can betray you. Seems little harsh.Right? Believe me I learned to be lonely and it proved to be the best thing in the world.