It's always ok to take time off writing, and it's always ok to either never return, or come back with a vengeance. Your craft is just that, yours. Wanting to share will always be an extension of generosity. But keeping writing to yourself is not selfish, its generous to yourself. There are no negatives to creation.
Ending #NaNoWriMo2013 with a bang. I'm past the 50k and going strong. Much to be done as the characters find that all life is about to change. No one is ready.