Like you,I have lost both my parents and Christmas is just a period in the year to be got through. A few years back,for various reasons I spent Christmas Eve and Christmas Day entirely on my own. I had been invited to my sister's,but,it would have been too crowded etc and I just prefered to have my own space. As it turned out,I actually had quite a good time to myself. I had the house and telly to myself,cooked my own Christmas dinner to eat when I wanted and had lots of snacks to hand. Rented some videos and didn't have to watch any typical "festive" offerings. The thought of Christmas on your own,is a bit scary,but,you should do what YOU want and need,and firmly but politely,thank all the offers and assure people you will be fine on your own. That was my experience,it may not be for you. Good luck with your decision x