Christmas can be a great, fun and resting time if all is well in your life. If things are even slightly off centre, it can be a miserable, cold and lonely time.
My Mum's dad died on Xmas Eve, when she was 10yrs old (she's now 73!) and his body was kept in the house all over Xmas and New Year, as in 'those days' the funeral parlour was closed for holiday! Every year when we were young, she'd be upset, drink too much and get maudling and I truly hated Xmas, as to me it represented walking on eggshells and being tense.
I have had to fight against the residual feelings of all this and I actually am looking forward to this year probably for the first time! I am 43!
Homerbart - you are not alone.