Why Can't I sleep??

I am 15 years old. I turn to bed around 9pm and everynight I wake up at 12am or 2am within the morning and don't go pay for to sleep until like 5 or 6 within the morning. What's wrong with me. Oh! and I expect that my sleeping has a problem to do next to the ac when ever it is cold in my room I dribble asleep immeadiatly but when it gets hot surrounded by my room I can't sleep. Maybe I just answered my own give somebody the third degree to why I can't sleep. Watever. Anyways like ultimate night it be really hot so I had to clear my window and it get sort of cold right away I fell asleep. Well I don't know what to do so if you have any suggestions of what might be wrong next please go on ahead and relay me. Thank you.Why Can't I sleep??
One of the things sleep specialists advice to draw from a good night's sleep, is have a comfortable room temperature, which is around 65F. So you are a completely mundane person, see?
What you hold to do is come up with something that will keep hold of your room's temp constant, even if that means spending somewhat more money on electricity, while your body adjusts itself to a complete sleeping cycle again.
my mom always aid something similar to that! she used to tell me if you cant jump to sleep simply pull the sheets down to your squander so that you'll feel alittle cold next you will just spatter to sleep...its normal