Ranger,
Jon may be right. I have those days too, but force myself out the door, only to find my performance level to be way down.
Listen to your body and your mind. Maybe you had a bad experience last time you were riding?? or maybe something is not right in another aspect of your life?
When I lost my job last year I "comforted" myself by buying something for my bike, but didn't try it out for a day or two.
We all have bad days occasionally. I find that when I "rest" because I'm not in the mood to ride, I do a whole lot better the next time I go out.
Don't be hard on yourself. Enjoy the relaxation. Your next ride will probably be great - maybe even memorable.
Ron