People who like to send friends will send them to the circle of friends to share with everyone no matter what happens, so that they can appear (don't panic when things happen, take out your mobile phone and shoot it first and send it to the circle of friends. ) such a famous online saying.
People who don't make friends are usually busy or don't like it. They just don't think these actions are necessary, so they are too lazy to do them. Birthday friends and things like that are in their eyes. It is not surprising that they don't make friends.
There is another habit. Some people don't care about the circle of friends because of their work or living habits in the circle. They all contact directly by phone or interact with friends in the real world, so there is no behavior of making friends.