Would you think this is rude?

I was planning on going to my moms house today for Mother’s Day just to eat and hangout and my fiancé doesn’t want to go. I’m still going by myself but I think it’s rude for him to not want to go. Every year I get his mom a card/flowers but she moved out of state this year. I don’t see why he can’t just hangout at my moms house with us all for just a few hours. Plus showing up by myself is just embarrassing.

Also am irritated at him for not acknowledging that I get to celebrate this year too, did not expect any sort of anything from him but a ‘happy first mother’s day’ would of made me smile.