Longhorn, some great advice was posted by skinnyafatbody below your comments. The best path is the high one, show your good manners, yet be assertive by smiling and repeating that it is a personal matter.
You have to decide how to handle this situation. If you are comfortable enough, tell people. Be aware though that there are those who may be negative. (You don't need any negative vibes!) Hopefully all your co-workers will be supportive to you if you tell them, but after reading some of the comments posted, you can never be sure.
Look inside yourself, choose your path, and then be committed. Good Luck!