For a few years now, I have felt as if my life is completely and utterly meaningless. I truly believe I have no use in this world and sometimes I question my existence. Recently, I've been having suicidal thoughts which constantly comes up every day. I have distanced myself from many people in my life, and I no longer know anyone whom I can trust. I know I should get a professional to diagnose me, but I am still fairly young. I live under my parent's roof, and they don't think I need to get diagnosed by a doctor. I am in a decent environment, so part of me believes I have no reason to be depressed. Could it be depression?