Noun
the one friend who is closest to you
Source: WordNetThe mirror is my best friend because when I cry it never laughs. Charlie Chaplin
My best friend is the one who brings out the best in me. Henry Ford
Diamonds Are a Girl's Best Friend. Marilyn Monroe
A friend who visits you when you are suffering is your best friend. Rwandan Proverb
A dog is a man's best friend. English Proverb
My friend's enemy is often my best friend. German Proverb