You're not alone! I've been scared of the dark ever since I was a young girl. Don't have any idea what caused it, but I remember that I would go to bed at night and tell my mom and dad to leave the light on. I could only have the light off when my other sisters came to bed (4 girls and 4 bunk beds in one room!!!). As I got a little older, I could have my light off ONLY if my door was opened. But I couldn't be the only one with the door opened though. I know it sounds weird.
When I got married, I was okay with being alone at night or very early in the morning. I had my daughter later and still was really OK. My husband gets up at 2:00am every morning and leaves for work by 3:30 - 4:00 am. It was no big deal...I would fall back to sleep. But one Saturday night, he and I went to see a movie, "Death Wish II" and the next morning he was leaving for work, I laid in bed and started to panic. I couldn't breath...I was in terror. I got up and called my Dad and told him that I was coming up to their house with my daughter. Then around 8:00am, I went back home. No big deal. Then this because an EVERYDAY event when my husband would go to work. I'd get up 15 minutes before he was going to work, get our daughter, and head up to my parent's house. This went on for 3 years.
How I got over that was when I was pregnant with my 2nd daughter. I was about 7 months pregnant and was so sick and so tired, that I just went out onto the couch, WITH the television on, and the dog by me. I eventually realized that no one was trying to break into the house.
Now, I don't like walking by doors with the lights off. It freaks me out. I go to bed at night and have a ridgied pattern as to how I turn off the lights, NEVER leaving myself having to walk in the dark. The television is on in my room to give me some sort of light so that the last light I turn off is the hall light right outside my bedroom. I can't sleep with my feet or hands off the bed because I fear that "something" or "someone" is going to touch them.
If I'm by myself at night, my mind wanders and become over exaggerated. I get spooked very easily and would fear that a ghost or a demon was going to appear. I get spooked having too much of an open space behind me because I fear that someone (again, a spirit) is going to be behind me.
I'm better than i used to be, but still have a long way to go. One of the things that I am trying to do to help cure me with this is realize that this just isn't going to happen. I am trying so hard to have the faith that God won't let the ghosts and demons get to me. This has really started to help.
So, you're not alone.