I'd agree with @OhamIreally. I've spent Christmas's alone in the past. Many years ago after the breakup with my then partner 2 days before Xmas after 7 years together, I spent it with my dad and my kids and the second year just with my dad. It was so bereft because he lived with his GF and they didn't buy each other any presents and I'd bought myself nothing.
The following year I promised myself it would be different and through the year, I bought myself little gifts and wrapped them then stowed them away - I knew I'd forget by Xmas what I'd bought. I spent it on my own with the dog and unwrapped my gifts, which I was delighted with! No more crappy presents and pretending to be pleased.
Since then I've had a number of shit relationships, tbh. The last 4 years I've spent it with an on/off serial whiner and abuser. November and December would be packed with complaints and I would be left to clean up, cook etc with.... no-thought presents which I was meant to be in rapture about.
This year, we broke up a month ago, so this is how I've celebrated Xmas in the past on my own and I'll do the same. I was only thinking about this today, so your thread is timely.
I will:
Have whatever breakfast I want and fancy making.
Cook my own Xmas dinner for me with lots of leftovers for over the next few days
Bought tin foil cooking stuff so little washing up and ready prepared veg to shove in the oven
Surf the net for hours and look for make up and perfume/clothes bargains - something I've not been able to do as I was catering to the whims of someone else
Go for a walk with the dog.
Talk to I want in a pub with no aggro afterwards about 'flirting'
Watch whatever I want on TV
Not worry about gaining Xmas weight
I have - as I have regularly done for years now - bought myself my own thoughtful gifts and can get what I want in the sales which I can browse away for hours without any disturbance.
You've got this, lovey. You have. <3