Hello OceanPheonix, we aren't qualified doctors but we can suggest to you that everything you have told us indicates that yu do need to go and visit your doctor, who will then diagnose you and direct you into the areas that will help you.
This illness has the capacity to make you feel exactly like you have said, it's not your fault so please don't blame yourself, because if this happens it only locks the door we are trying to open for you.
As well as talking with us, you can also contact Kids Helpline 1800 55 1800 by phone, web chat or online, they help people from the age of 5 to 25 and a trained counsellor will assign themselves to you.
Please don't worry as we ourselves are volunteers but have our own experience.
It's good to vent... I can relate a bit to you. I'm not physically tired all the time, but I often struggle with motivation. I'm often told that 'life can't all be fun', which is very annoying. Do you have a hobby? Sometimes a change of pace can help you get excited about doing things. Also, having background noise e.g. rain noise can help when doing school work, I know I wouldn't survive school at the moment without it.
If you're really tired all the time to the point of not being able to get up, it might be a good idea to see a doctor.