refusing to sleep when i am sleepy

how many nights i just sit right in front of here.. doing nothing.. mind blank.. super late into the night.. 2 or 3 am and just don't want to go to bed.. even though i am downright tired.. just being unproductive.. and not achieving what i want to do disappoints me.. i am really tired really sleepy.. but i don't know what is it keeping me from tucking into my bed.. absurd.. getting totally unreasonable.. should i go to sydney? don really know what to do there.. it maybe just an exciting idea.. okay don go.. put whatever that should be behind my back at the back.. AT THE BACK.. tonight.. i'm gonna sleep on it.. i give in..