Help me out I'm dying

Help me out I'm dying
Help Me
I am a student of grade one , and I determined to study hard. But I have a big problemd. I always feel pretty sleepy. why are others not that tired? I sleep not less than eight hours almost every day. I always break my study at 10.00 at night. Even though I still want to sleep. If i don't have enough sleep, I feel sleepy from morning till night, and then I feel very dry in the eyes, I also feel the body is hot at intervals, is that an exothermic chemical ? what problem is with me? A disease? If not sick how exactly can I not feel tired? How to adjust? who can tell me? Help me, please.