I think it is a serious cold violence not to talk to you all the time, because you don't know what offended her when she didn't talk.
Living in a dormitory like this is particularly embarrassing, and other roommates may also be affected. I feel that the atmosphere between you is not right.
In this way, people in the dormitory may look at you two and dare not laugh and play as usual.
Usually, what we talk about starts with a joke by one person, and others will talk about it. But if that person has a cold war with you, he may not get involved and don't want to talk to you.
Especially in the past, after school in the morning and evening, we all walked together, ate together and went to the library together, but now some people choose to avoid it and leave without saying hello. I think this is cold violence.
I have experienced cold violence, too. The other party won't say a word to me and has objections to me. Even if we sit together in class, we will sit far away from us. These obvious actions show that the other party is in a cold war with you.
The other person will not be as close to you as before, and even deliberately alienate you, so the relationship between the two people will become more and more embarrassing.
Some roommates will speak ill of you in front of other roommates when you are away, saying that you are too bad, and they will identify with themselves and alienate you.
At this time, you should pay more attention to yourself. By doing this, she is simply deliberately forcing her roommates to queue up and want to ignore you unanimously.
You'd better talk to other roommates, tell them the truth and don't let them misunderstand you.