I'm like you and am all alone but not lonely. I go outside and there are many people walking around me until I go inside my apartment. I talk to myself too. I do this occasionally. I don't have imaginary friends though. I talk to myself to give myself comfort and to reassure myself. I know that my existence has some meaning to others around me. I feel depressed at times because I become tired easily. However, I know I have value as a person and am happy at times for finding satisfaction from the little things I do in my life. I sometimes feel so tired though and apathetic that it makes me depressed. But, the next day I try to feel better by going out and doing things. I see many people here in Tokyo too. I never feel lonely but know that in my darkest moments I feel all alone in my despair until I realize I am not alone in this world and should not feel pity for myself. I am rambling again. I apologize. I hope you feel ok and find things in life to make you happy.