sleep. . .?

I can't sleep lately. I don't really know why. But every night when I try to go to bed, I end up tossing and turning then trying to read a book and still am not able to fall asleep. I keep looking at the clock and getting frustrated at what time it is and the fact that everyone else in the house has been sleeping for hours, and I'm still awake. Ugh. 

I don't want to take sleeping pills because I'm afraid of dependency, but I wonder if I tried for a week and see if things got any better. . .? 

I'm tired of not getting to go to sleep. That's such an oxymoron.