What’s wrong with me ?

See your doctor.

your to bored and not enough sex , thats all .

Start drinking coffee to get yourself going (or caffeinated energy drinks).  Guess what, low energy is very, very, very common when you reach adulthood.  A doctor can have you do a CBC (complete blood count) but when it all comes back normal, you'll know that you are one of those many people who are fatigued all the time.  

There are a few people with a high metabolism and they are high energy but look around you-it's not the norm.

I can't answer the question you asked but I can advise you . Break contact with the earth every time you do, you create energy It's kind of like creating a spark , every time you put a gap between you and the ground a silent spark is created . ENERGY . every time you break contact , every time there is a gap  the larger the gap the stronger the spark   . Energy, Boundless energy . don't expect the results over night , give it a chance . two weeks , just spark it up every day ,,,, charge it up . 

 It could be anything but most likely chronic Depression z
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you could improve your diet and get some exercise or go to the dr. for a blood test and health check.

There's a variety of illnesses that have fatigue as a symptom. Depression conveys a sense of fatigue. Only a doctor can diagnose. There are depression screening tests online, such as CESD R. Screening tests don't diagnose but they might shed some light on your situation. 

It would be a really good idea for you to see your doctor about this. If the diagnosis is depression, there's a variety of things that can help and a big advantage to having a professional who knows how to use them. There are healthy lifestyle choices that enhance the results of the standard treatments with office visits. I have details in my answers and you're welcome to click on my name and read.

You must have lymphoma or a brain tumour

It sounds like you need a check up cos you could be lacking iron.

I knew a young guy who kept feeling tired and it turned out that it was a pill that he was taking. He was ok after that.

Tabitha, go see the doctor.