How can I break my addiction to staying up late?

No matter how tired I am, I just can't bring myself to get into bed and try to go to sleep until the break of dawn. I find it extremely depressing to have to turn off the computer or TV and call it a night. I feel like I'm going to my death. Consequently, I put off going to bed as long as possible and waste a lot of time staying up throughout the dead of night when most people are rejuvenating themselves for the coming day. I don't have to get up early for work, but I still feel like I'm sleeping the day away. I do love the quiet of the evening, but I would like to get up a little earlier, just the same. Is there any way I can learn to consistently manage to get to bed without feeling that terrible loneliness and anxiety I always feel at bed time?