I'm going to lie about my holiday plans so that no one knows I'll be alone again on Christmas
Why don't you want people to know?
People keep inviting me to their Christmas parties but I have to go by myself, and that is uncomfortable for me.
Being alone at a party can be sad, but you could also meet new people and have new friends. Go to the parties and don't let it bother you about going alone. You won't be lying to yourself either that way.
I don't want to meet new people and I don't want to socialize.
Sometimes we need to take a break from other people. If you rather be alone then that's okay.