Yorkiegirl, I am new (ish) to MN but tortoise has told me some bits about you and what you have gone through this year. I can see why you would not want to get in the Christmas mood.
I am not going to say you should or should not. But how would your DH wanted you to be at Christmas? How were your Christmas`s? I think he would want you to be happy and do things as you would and remember him when you do those things.
He is always going to be on your mind every year so why not have those times as happy ones and not sad ones.
I know its easier said than done. but I really don't think he would want you to be sad but happy and thinking of all the happy times you had.
I will be thinking of you. I had a hard Christmas last year. My first one on my own with 3 DC and after a really fab one the year before. It even snowed on Christmas day on my fab year. This year I am going to try my best for my DC.
I hope it all goes well for you.