So, if you don't like it and haven't, are you out of the group? I don't think this is necessarily out of the group, but what is certain is that you will alienate your dormitory. Because parties are actually the best way to strengthen feelings. Many times we go out to eat and play together, and then we can get to know each other soon. These two people soon become close. If you don't go, people will reject you unconsciously. It doesn't matter once or twice, we will give you a good reason.
But over time, people will have opinions about you, because this is a group activity, and every time you have a reason not to go, it will make roommates feel that you don't want to integrate into their group and make friends with them. So even if they don't show it on the surface, they will be obviously different from others and you.
In addition, if we go out to play together, there will be similar topics. When people talk about this interesting event, you won't fully participate in it. You will feel like an outsider and inevitably feel a little lonely.