Oh, I'm familiar with that sleeplessness feeling. You know it's really not healthy to stay up, but you do it anyway and you just keep looking for something to do to avoid going to bed. Internet is dangerously good for that.
For me, what's usually going on subconsciously is not about not wanting to sleep...it's that I don't want to wake up the next day and find that nothing has changed. That went on for quite a while, until one day I was laying in a bathtub and just said to myself "if you don't find a reason to change this, you're going to feel like this forever." And I scared the crap out of myself.
The next day, I stopped spending time at night on the computer. I barely turn on the TV. I can't say what your ah-ha trigger will be, or if that's how it will happen for you, but that's how my perspective changed.