Snappy,
I agree with the rest of the ladies, you were probably burnt out. I know when I start feeling that drudge, I just do something else, go for a run, swim, or something completely different like go to a museum or the beach (if I can). It's good to change the pace every once in a while and let yourself breath and take in what's around you. It's ok to take a break, just don't go crazy on it Riding for fun is the best kind of ride!