Everyone has different classes and different classmates. Different classes will give you different feelings and experiences. Some people will selectively like one or two class reunion, but will avoid one or two class reunion.
This should be related to his previous experience in class. When you feel that all the classmates in a class are good and you are happy with your study and life in this class, you are usually willing to attend a classmate party. When your class often fights, the students don't talk much, the learning atmosphere is not good, you have no enthusiasm in class, the students are not very United, and you have no friends to talk to. At this time, I believe most people don't want to attend class reunion because they feel boring.
After you go out to work, you may also consider your own development. When you were very satisfied with your work and happy life, you wanted to go to the class reunion. Talk to your old classmates and tell them that your life will be very satisfying now.
When your life is very unhappy now, I believe most people don't want to go to class reunion, because life is good when you look at other students, and when you show off your life everywhere, you may be even more sad. If life is not satisfactory, you should not want to attend class reunion.