To make sincere friends, you should not only be sincere,

It is also very important and easy to distinguish whether others speak or do things with a strong purpose (such friends are not good).

As the saying goes, birds of a feather flock together. What kind of friends do you want to make? First, what kind of person do you want to be?

You can also try to put your heart or emotions

Share it with the friend you want to associate with (provided that you have some contact with him)

Also, in fact, many former classmates can contact again, and maybe you will find something new.