Who's family do we spend Christmas with?

My boyfriend and I have been together 2 years 9 months, the last 2 years we spend Christmas Eve night with his family, we leave at about 10 am on Christmas Day. This year, it's different. We have our own place, we have our own little family in the form of two dogs and a cat. I want to include them in our Christmas. His family hates animals. Another thing is that their house is pretty crowded this year, we would be crammed on to a choice of a rock of a double bed or a single bed with springs digging in your spine. I'm not happy about this. The main thing is, although they can all speak fluent English, they speak Portuguese whenever I'm there, they don't speak to me apart from the odd word. I find it rude and ignorant. It makes me feel extremely left out and alienated. I don't really want to spend the holidays feeling this way. I don't know if he understands. Am I being rational about not wanting to spend the holidays with them? I want to leave at 10 pm, I don't want to stay there. What do you think?