This situation is not uncommon, and the purpose of building a group is also varied. Maybe just to facilitate communication during the trip; Or there is something personal that is not convenient for everyone to know together. In this case, it is understandable and not chilling. It's really chilling if you meet a group that shares their little secrets and spit on other roommates. When I was in college, there were several people in the dormitory who had a good relationship with outsiders. The real situation is that a dormitory often has a small split, but everyone has not broken words because of feelings. Once the coat of kindness is torn off, what remains is endless sadness.
This is a real scene in college life, and it can't be said that college students have complicated hearts. In fact, no matter what age, people with complex hearts are indispensable. Apart from the innocence of youth and ignorance, once people start to grow up and come into contact with more and more things, their hearts may become turbid and complicated. This is an inevitable process of everyone's growth, but according to different personal choices, some people indulge themselves, and some people choose to stick to the bottom line of being a man, so there are people with different personalities in the world.
In fact, there is no need to be too angry when there are many small groups in the dormitory. To some extent, everyone is the same, unless you are just in a large group in a dormitory. But often in this case, the high probability is that you are isolated. Casual friction may be due to living habits, or it may be due to various problems in study and personal life. This is not a big problem, as long as it doesn't affect the normal life of you and others, you can do what you want.