I wouldn't say I'm afraid of the dark. My room is pitch black when I sleep because even the littlest bit of light tends to distract me and keep me from falling asleep, so I try to avoid any light.
As for outside, I don't necessarily fear the dark unless it's so dark that I cannot see where I am going. I know there's always a chance of crime happening. When I was in high school I used to go a charter school at evening hours, and because I didn't drive or ride a bike I would take the city bus. Unfortunately, I still had to walk quite a distance in the dark after 10:00 PM, so it made me a little nervous for a while, but I would be sure to stay alert at all times and keep an eye on my surroundings while listening for any noise. There were times where there was so little activity that the streets felt almost ghostly. I'm glad those days are long gone.