Why can't I spend my New year alone working in the office?

Hello, so I am an Architect, and I have deadlines which are not at all irritating for me I'm happily working and producing the output. In the process I might be working late today till midnight maybe. Now people around me want to party and enjoy and I personally don't like New year parties. I have no valid reason to be like that and I know it's annotfor others when I behave like this. I was raised in a home where we used to have a good food maybe paneer ki sabji and watch award show where Salman Khan used to come in the end with the New year countdown. And I was happy with that life, I don't want to party and get drunk or something. My girlfriend is in my office, she said yes to one of your colleague about going to a cafe till midnight. But they all want me to come as well. When I said no, they are started being ridiculous by saying that they will not go as well and everyone will go to their homes. Including my girlfriend who lives with me. I asked my girlfriend to go with others to the cafe and let me stay here and work I'm not depressed or unhappy. I just don't want to do anything. I'm literally being looked at like I'm the reason behind them not having a party. I'm not even restricting my girlfriend coz a lot of time when the guy says No then the girlfriend also does the same thing. At the end I convinced my girlfriend to take everyone to the cafe and I might join later like after 9 or 10 maybe. But now I feel like if I don't then I'll get judged again coz she will not stay there till midnight without me. I sometimes feel so pressure, and now I have to join then till midnight with my work pending that I'll continue tomorrow and as I'll be up till midnight, I will be sleep deprived tomorrow. I don't like this. But what to do, we are social animals, it's so difficult.