wad are really friends FOR?

PEOPLE!!! PLEASE TELL ME WHAT ARE FRIENDS FOR? Because yesterday night... i just break my friendship with a close friend... just like that... isgh... nevermind... break friendships liao what... And what sessions have i learnt in it? maybe a lot too... I break friendship with weix2... This matter makes me felt sick... fever still haven gone yet and it is getting higher and higher.... 38. 4 degree.... Help....