Why do certain people get suggested to add as close friends on Facebook?

[Alex]

- A window on Facebook will eventually pop up telling me I should add them as a close friend

- Why did THAT person get suggested to be added as a close friend?

- Does it mean they look at my stuff a lot?

[Ravisankar]

hmm the persons that are suggested to you because of many causes . Causes may be , your frequent visiting of their profile or their frequent visiting of your profile , there are mutual friends between you