Amanda, I don't like the thought of you being on your own at Christmas, either! I've had a few Christmases like that, and they weren't easy.
This might sound daft but you could volunteer for Age Concern or maybe the Salvation Army and spend part of Christmas Day run off your feet serving dinners, playing games and keeping merry-makers merry! One of my friends did that and had a great time (and ended up shattered by late evening!).
You might prefer, of course, to sit comfy at home, and put your feet up... LOL.