How sad.
How sad it is that your friends who profess Christ seem to have a rather singular lack of sensitivity to your feelings.
If I were your friend, and you were to wish me a Merry Christmas, and I knew that your December 25th meant work or Chinese food or a movie for you, I might be inclined to respond to your wish to me for a Merry Christmas with something like this:
Thank you, my friend. And my best wishes to you and all those close and dear to you for a most joyous Christmas Day. On that day, whether you are at work -- or doing whatever you are doing -- please know that you are in my thoughts. And also please know that I will be giving thanks on that day that you are included as a part of my world. Best and most sincere wishes for a most Merry Christmas."
It is precisely because I would understand that Christmas Day for you is not a "merry" day (because of the circumstances of work or food or movies) that I would want to wish you joy.
How sad it is that your Christian friends feel -- for some reason -- that they are u nable to take the simple act of kindenss (wishing you a Merry Christmas) when they know that you will not be having good day.
I'm happy they don't. It's not my holiday nor will it ever be.