afraid of the dark

I'm 19 and I'm scared of the dark. I feel ashamed of it, I feel like I'm a little kid. I don't have any particular traumatic events (that i recall) involving darkness, but I still feel anxious. At night, if I'm not asleep, I shine my flashlight multiple times to see if there isn't anyone or anything else in my own room. I do the same when I come back from a well lit room into a dark one. I feel scared in my own home and it's something I thought I'd grow out of, but I didn't. Is there anyone else with a similar experience? How do you deal with it?