I can't sleep.
No, no, no-- that's not right-- I don't want to sleep. I don't want to go to bed because I know that getting up in the morning means I have to go someplace (work) where I don't want to go. Not that I don't wanna work-- I just would really like to have a job to go to where I look forward to being there. I'm working on that part. But in the meantime, I don't wanna go to bed. This is not exactly the same as not being able to sleep.
I can sleep. I just can't go to bed.