On a certain day or night, the best night, when people are ready, tell them boldly, seriously and openly, for example, in the dormitory: everyone be quiet, I have something to say to you. I think you have a problem with me recently. If you have any questions, just ask them directly. I know sometimes I say things carelessly and I don't mean to offend you. I'm sorry about that. We are all classmates, so there is no need to do this. . . . . . Think for yourself.
Pay attention to the atmosphere It is best to talk when the dormitory is quiet. Don't let some people do this, some people do that, and the effect will be bad. Speak tactfully, making people feel that you are sincerely apologizing. At this time, it would be great if a leader came out to help you ease the atmosphere. In the process of your speech, they should insert a few words sporadically, such as it doesn't matter, it's really unnecessary, so you must be sincere.
Prepare carefully in advance. On the whole, I think the effect should be very good. If you can't get their understanding, you don't have to be alone all day. Do whatever you usually do, but be careful what you say in the future. Seriously, if you can't be forgiven, don't worry too much. Their forgiveness is not worth it.