I've been really tired recently i am very happy but it hard to get up in the morning and to stay awake during school. what do i do?

Get seen: A full history and basic labs are in order. It would be a shame to miss anemia (even if you are being treated, there may still be something wrong here), sleep apnea. One of the infectious mono family, lupus / arthritis or some other common illness. All need to be ruled out before looking for a functional cause, and since you self-describe as happy, some cause is like to be found.