Sleep help please read all?

hi i'm an exhausted and sleep-deprived adolescent of 14.i like sleep, but there are so many things keeping me from going to bed. 1)computer 2)books. i do both each night and i hate myself for not being able to get to bed on time. i average around 2:30 am each night and wake up around 11 AM. its bad to sleep after 12 AM. the thing is that literally every method known to man other than pills has failed to get me to go to bed on time. the only way is for my mom to turn off the PC and watch over me get ready to go to bed then finally closing the door while im finally in bed. i cant make her do this every night because she's busy as she is (being a teacher). i literally have NO willpower whatsoever, and ive been trying as hard as i can to fix myself, always coming to a failure. i'm not lazy or anything im a smart student and a good person and even my father (who is a light sleeper and is not happy about being woken up by someone who is up late) cant intimidate or convince me to sleep early. even today when im exhausted for swimming for 5 hours and walking UP a hill for some time i cant get to bed. i feel like someone falling and grabbing on to a flag pole to try to support myself and keep breaking and grabbing on to the next one, instead of actually flying back up. please, please, help me, i havent gotten a good night's sleep for a whole year literally. help me.i sometimes feel like going into fetal position and crying I WANT TO SLEEP