how can someone be tired their whole entire life
A doctor can check for physical problems such as hypothyroid.
You need to have a complete physical. That would include blood work. Ask the doctor to check you for fibromylgia. If everything checks out good, you might be depressed or bored.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them