人分這么幾種：不認識，認識，熟人，朋友，知心朋友。朋友不在當面表白，而是背后說起朋友的時候，是否提到過你。
People can be divided into these types: strangers, acquaintances, familiar people, friends, and close friends. True friendship isn't about compliments to your face, but whether you're mentioned when they talk about friends behind your back.
