AITAH for yelling at my fiancé after he destroyed my project because I chose work over a party?

My fiancé’s best friend celebrated his birthday last night at an exclusive restaurant. He wanted me so much to go with him, but I needed to complete a critical work project. I told him that I was on a deadline and if I did not get it done, I might miss an opportunity for promotion. He wasn’t pleased and informed me that it was not acceptable because all his friends would have their girlfriends with them. As he left, he grumbled, I just hope it’s worth it, and walked out.

I attempted calling him, but he did not pick up. I finished my project and then showered. On returning, he was seated quietly in the lounge. I went up to complete my work, only to find that my whole laptop had been cleared, my project was erased. I was stunned. I questioned whether he did it, and he confessed, explaining we were now even since I humiliated him by not accompanying him and forcing him to arrive alone.

I lost it. I yelled at him and told him that he was insecure for being more concerned about appearances than my career. He said it was somewhat my fault and that I should have just gone along with him. Things escalated, and he told me to quit calling him petty and insecure. He then left and stayed at a hotel. He’s been sending me texts nonstop, telling me I hurt him with what I said and that I didn’t care about his feelings.

I believe being in a relationship doesn’t mean I have to attend every event. He thinks it’s disrespectful and socially rude to let him go alone unless I’m seriously sick or out of town.