Hello, I'm glad to answer your question. Personally, I feel that you are too cautious. No matter who you communicate with, it is no problem to think clearly before speaking, but you should also understand that answering people in time can also be regarded as a courtesy and respect. After all, people will definitely wait for you to say the next sentence when they say one sentence. If you wait too long, whether the other person is a boy or a girl, you will naturally feel tired talking to you. I only live in one dormitory in the university, but the relationship between classmates is not as complicated as you think. Let's live a real life and relax. In fact, the relationship between classmates should be the freest and most frank. As long as you are kind, modest and approachable, you can get along well with your classmates and have many friends. So, be bold, occasionally say the wrong thing and make a joke, it will be more real and relaxed, and it will be better integrated. Personal opinions are for reference only. Please accept them if you are satisfied and ask questions if necessary. Thank you for your support ~