What is the difference of being alone and lonely?

when u say ur alone.it means or it implies there is no one with u.for eg...i am saying am alone now means.there is no on with me.right now while am typing this. whereas lonely means the personis longing some companionship,he is sad, it refers to the state of mind of an individual...that says it all

well being you can be alone also if you are in a group but being lonely means you have no one to be with

If you feel comfortable being lonely, then its better. I think if you are alone and stay away from the crowds, you can make very good decisions about your life. Lonliness introduces to yourself. It tells you about your good and bad point. I have been lonely these days and Im reallly enjoying it.