I don't even know how to start this... I've never posted on here so I'm sorry in advance.

I basically work for my boyfriend. We opened a bar together with another person (Partner). Partner runs the kitchen aspect and does a lot of stuff on the side that involves cooking. Stuff like cooking for movie sets and whatnot. Without getting too into it, he is childhood friends with a very popular director/ producer. My boyfriend and I do the bar side. I manage the bar and the employees, boyfriend just kind of dictates. He gets a lot done and makes sure stuff is running properly, but hardly does any of the physical labor. Sooo Partner has an event coming up tomorrow and normally he asks a few of the employees to come and help (serve food and whatever else). When he was talking to one of the girls about the upcoming event, I made a sarcastic joke about being offended that I'm never invited to these things. It was very obviously sarcastic and I don't really care that I don't go as I have a lot on my plate already and don't need extra stress... Here is where things went south- two days later I find out I'm expected to be there to help, which okay cool, I can make it work. Nope. I get blindsided with heinous remarks from my boyfriend. He said a lot of things that I surely cannot post here, but the gist of it is "How are you going to go work for him and stoop so low as to serving people when you're MY woman?" Basically it makes him look bad that I'm going to serve famous people. I don't know if he's that dense to think I'm somehow not in the SERVICE INDUSTRY, or what, but now I'm the bad guy for even being willing to go help Partner. All day I've been yelled at and literally called f**king stupid infront of patrons. It was bad... people were uncomfortable and they left. I'm all discombobulated right now and am not sure if any of this is even making since to you, but I need to know- AITAH for not saying no to Partner when I found out I was supposed to go?