I'm just Tired

I'm Tired. Not physically tired, mentally tired. Like my brain can't do anything anymore. Not even think. Or even work right. It's driving me insane. But not to the point where I bring it up continuesly. Or even bring it up at all. It is making me feel dismal. To be honest, I fear dismal. The fact I am dismal sometimes scares me. I feel like I need to be happy all the time. Bring the joy to peoples faces when mine isn't. It makes me tired all the time. I hide that mental tiredness so others don't feel drained or tired like me. I don't want to see others tired. I would make me feel guilty even if I didn't do anything. Maybe I just overthink things. Or is that overthinking right. Maybe I am the one who drains everyone, drains every soul. drains every happiness created. Or Maybe I'm just tired.