I recently met with my friends from school, after a year. We used to be great friends, back then. But now suddenly after a year, when we met, it felt so weird and different. They have changed, I have changed too. I ended up feeling so sad later on. I got such negative vibes. Unlike earlier when being with them used to make me happy, this meeting left me feeling sad, empty and listless. I know they're still my friends and nice people after all, but I just don't want to meet them again. What do I do? Am I becoming one of those people who "forget their school friends when they get into college"?