Lonely people in college may all travel alone, watch movies alone and eat hot pot alone.
There is no special reason, just don't want to spend time waiting for each other. Waiting for others will get impatient and make others embarrassed.
In fact, university independence is also good. You can do whatever you want, whatever you want, whatever you want to say, whenever you want to leave. Don't consult with others, and don't wait for others. You can also get into the habit of being in a daze occasionally and thinking about life.