Some people are your friends because of where you sit. When the seat changes, you’ll find out which ones.

A lot of closeness is really proximity. Sitting beside someone for a semester produces real warmth, and that warmth can be genuine and still not survive a new timetable. It is not a betrayal when it fades; the thing holding it together was the seating chart.

Rather than testing anyone, notice who makes an effort once the easy contact stops. If there is somebody you want to keep, be the one who reaches out first and names an actual time. Let the rest be what they were, which was good company in a room you shared.