Did I accidentally hurt his feelings? :0?

I'm working on this project and a fellow student of mine is helping me. I teased him I would be out of his hair soon and he doesn't have to see me ever again. He paused and said,"well, that would be sad." Very matter of fact. Then laughed afterwards and said that is a part of life. I was surprised and asked what he meant by that. He looked down but looked at me and said "people move on." He looked almost embarrassed. What happened here? I think when I see him next time I'll let him know it was a joke as I do like him.
Did I accidentally hurt his feelings? :0?
Add Opinion