My roommate looks dead when she is asleep.
That does sound strange. But why does this bother you, she's not really dead you know?
Dead or not, but her face looks so creepy when she sleeps.
I can see why you would think that's creepy. But it's also creepy to be watching someone sleep, so if you don't watch her, you solve both issues.
It's okay, I don't touch her, I just watch her.
That is still creepy. People don't expect others to watch them sleep, it would make them uncomfortable.