Because my husband's side of the family had Thanksgiving dinner without us, I'm thinking of declining an invitation to celebrate Christmas with them.
Would it really be that bad to spend Christmas with your in-laws?
The problem is I have been with my husband for a long time now yet they never liked me from the start.
Family members usually celebrate holidays together, but sometimes it's okay to not to. They may be upset at you declining their invitation, but you're allowed to set boundaries for yourself and your immediate family. Try giving them a reasonable explanation why you're declining, so you can avoid any negative fall out.
Maybe so but there will be negative fall out no matter what because I don't think they like me. I do have many other things to deal with here.
I support you choice in not spending Christmas with them and if they choose to make you kindly declining an overly negative thing, then that's on them. Just try to do what you can to minimize drama and then move on from it. I hope you have a good holiday!