Major vent- Fiancée keeps changing his mind

Let me begin this post by saying how much I love my fiancée, how supportive he is, how hard he has worked to help plan this wedding, and how the majority of the time we are on the same page.

But dear god, I need to vent and throw things and give him a swift kick in the a**. Backstory: we are getting married in Spain because that is where he is from and we wanted to keep our wedding small and intimate. He assured me that his family would be okay with not inviting everybody, would be okay with traveling, and that we could do a more casual affair. We had so many long talks about the pros and cons of this decision, but we made the decision and I haven’t looked back.
However, as it turns out, his parents were really disappointed, and begged and pleaded that the aunts and uncles (their siblings) be invited. As they are helping to pay for parts of the wedding, we agreed, but we also agreed to no cousins. At this time, I asked him, repeatedly, if he wanted to change his mind about how we approach the wedding, if he wanted to invite his whole family, etc. He assured me no, this is what he wanted, he didn’t think his aunts and uncles would come anyways because it wasn’t that important to his family in general. I was skeptical, but it was fine.
Fast forward to Christmas. We go to Spain, we have Christmas dinner with his family. They are all there, and are very very excited about our wedding, about coming to the wedding, and being a part of the wedding. My dearest fiancée then proceeds to tell them that not everybody is invited because of how much it costs. And then he realized his mistake and tried to backtrack and explain that weddings are so expensive, etc etc . And it made it worse. Much worse. I literally had to kick him under the table and whisper in his ear to shut the f*** up. I was so embarasssed. Luckily, they all speak Spanish, so I was able to pretend that I don’t speak it fluently (which is true), and I didn’t really understand what he was telling them. To the entire table of people. After this incident, I asked him explicitly if he wanted to invite the rest of his family, that he obviously has a closer connection to them than I realized, and that I was 100% okay with that, but we needed to decide soon so that we could change our plans. He again assured me that he was fine with our original plan.

Fast forward to today, and he tells me that his parents are INSISTING that he invite his cousins, and that he realizes that it is a good idea, and so he sent a message to all of them asking for their address and telling them to get ready to come.

We sent save the dates 5 months ago, none went to his cousins. We f-ing sent invitations to his side of the family 2 weeks ago!! We did not include the names of his cousins that live with their parents still on the invitation, we addressed them by specific names, on purpose for the express reason of not inviting them. We did not send invitations to his adult cousins and their significant others. And he fails to see why this is an issue. Yes, it is a fixable issue. Yes, in the grand scheme of life it probably doesn’t matter. Yes, I’m still fine with his family coming to celebrate. But mofo, why did you not think this through fully at each of these break points along the way. It is so embarrassing for me, and of course they are going to feel b-listed, and this will be the first/ second impression that these people will have of me. And I’m just... embarrassed and upset.

And also, we were planning on having a specific number of people, and so we picked the venue for that, we picked a weekday because of that, we decided on no dj, just instrumental music, because of that. But now he wants to go back and reconsider all of those decisions because of this new influx of people. After I have been telling my family, over and over again, sorry we are getting married with only our immediate family and a few close friends. But now that isn’t true anymore.
Oh, and the kicker, he wants us to change our RSVP date because he realizes some people won’t recieve their invitation until the rsvp date has passed. Wtf. I’m done. I just need other people to tell me I have a right to be annoyed, I think. Thank you for reading this novel.