I'm not in the holiday mood. I feel like the Grinch this year.
Why aren't you in the mood to celebrate the holidays?
I've been depressed the past few days and don't want to make anyone happy.
You shouldn't ruin other people's holidays by being a grinch. You should try and seek help for your depression.
No one is forcing me to do anything. My depression is a personal issue; mind your own business.
Just because you are feeling down does not mean that you should want others to feel down as well. While being depressed is a very difficult thing, just know that it is something that is personal and something that can not be fixed without effort from you. Do not put this frustration out on other people who simply want to be happy.