Lol what OP having is a full meaning of Laziness,he is doing nothing thats why hes body always feel tired for over resting,why not try to have exercise and make your self busy a lot?
Seeing doctor will not help since this is not a health issue instead this is attitude and behavior
If you are not doing anything productive or not doing any work out after a certain age you might feel really tired all the time, it is better to have a thorough body check up to make sure everything is fine internally and he can start working out and find something that motivates you and have an aim in life.
Lol depression never makes me sleep because I always keep on thinking a lot from what will be the answer
Everyone reacts differently when they are depressed, some people will eat a lot, some get addicted to alcohol and drugs and some will shut out everyone from life and try to spend time alone.