always tired and sad

I'm always tired and always sad. No matter if I get 3 hours of sleep, 5, 10, 12, I'm always tired. Lately I've been going to bed at 9 and waking up at 8 and all day I will try to wake up but I am so tired all day!! And I never feel happy, either. I just always feel very disoriented and I'm sad because I cannot feel good. I just want to sleep. My parents won't listen to me or help they just telling me I am lazy.