It is said that your friend circle can tell a lot about you.
If someone wants to know about you then your character, interests, hobbies and bad habits can be known by your friends.
It may be because we always do friendship with our type of person.
If we see that our frequency is not matching with the person we start to avoid him or talk to that person less.
See around youself you will find that the most of the friends have the same likes and dislikes.
So if you want to know about someone just see what types of friends he/she has?