Do you believe when people said 

" yes...i know what you feel.."

when we are sad...

when we are crying...

or when we are in a bad situation, people will say like that...

for me ( i said for me, not for us because nobody is same)..

they are not really know about our feeling..  (prove it!!)

because...

someone who really knows about us is ourself... (just it..)