I want to sleep my weekend away
Why do you feel that way?
I'm depressed because I had to do some boring work on weekdays.
As long as your work is finished, you should feel free to do as you please in your free time, even if that just means resting.  However, you'll probably feel better after a good night's sleep, so you might want to have other options for the rest of the weekend.
It's not as easy as it sounds.
You have every right to do what you want during your free time as long as you aren't ignoring a promised responsibility. Enjoy your weekend!