How can I get rid of my fear of the dark?

I’m a 13 year old girl and I have a big fear of the dark. I have a very creative and strong imagination (I’m not trying to brag) and I think that there are things like ghosts or scary creatures in the room that want to hurt me. Sometimes my eyes play tricks on me and I think I see something. I always always always sleep with a nightlight on, but I’m still scared! I know that it’s all fake and all, but I cannot control my imagination! I’ve tried to think of other things, but it doesn’t work! How in the world can I get rid of my fear of the dark and control my mind?
Please don’t say anything mean, I really need help!
And my parents will not take me to a therapist in this economy!
PLEASE PLEASE PLEASE HELP!