I Have A Roommate?

My roommate almost never stayed in our room. In a week, the times she slept here are around two to three nights only.

However, I never felt lonely.

Boarders in other rooms chat with me in the dining area. And I'm busy with schoolwork and activities that I barely realized the passage of time.

One day, I realized something.

The room I'm staying in only has one bed. Where did I get a roommate again?