We tried living together and it wasn't great so we agreed we'd all be happier living apart. It works very well.
Well, the beauty of living apart should be that you don't have to have people in your house you don't want!
DP has adult children who he sees regularly. One of the main reasons we don't live together was due to difficulties with the children/ex when they were smaller.
DP knows how serious this problem was as it caused you to live apart.
As a result we're all happier but I don't see the adult children at all.
So why does he think you want to see them now, at Christmas?
Due to many reasons, Covid, elderly relatives, unwell relatives, we haven't had many Christmasses together over the last 3 or 4. This year DP is spending Christmas at mine - I was really looking forward to it.
Seems you are more into this relationship than DP? He doesn't want to be alone with you at Christmas and is inviting people he knows will make you unhappy!
He's just told he's invited his children to come over and spend the day with us. Not unreasonable?
YES unreasonable, because he's pulled a fast one on you here! Sneaky!
So why does it feel like a massive damper has been put over my Christmas.
Um...because it has? Of course it has!
I'd rather be alone TBH than spend it with two young adults and their partners who have been so horribly hurtful in the past.
Then that's what you tell him. If he can't see that, he doesn't care about your feelings at all.
I just don't want to see them on this special day. I doubt they want to see me very much either.
Then it's complete madness to do so. Seems his ability to put his head in the sand and ignore stuff includes you, his partner!