here's an idea...put up a tree..put some lights on it..decorate it any way you like..bring out the decorations and make the house festive and happy..matters not if people wont be comming..not doing it may only serve to further your down mood.
I do understand about not wanting to bother...I discovered h's ow just before christmas and had no desire what so ever to do any of it...but forced myself to and was glad I did.