Please help,i dont know why i can never sleep.?

Ever since I was little I was never able to sleep. It takes me like an hour or more to fall asleep unless i take a sleeping pill. Then if i dont take a sleeping pill, i always wake up early and cant go back to sleep and i wake up in the middle of the night alot. I just want to wake up with 10hours of sleep felling refreshed ! ugh.Whats wrong w/ me?