Someone tells you that they know you.Are they really know you? ofcourse not, becouse they only know as much you let them to know about yourself.it's only you or even you may not know yourself.commonly we get hurted from those people with whom you are more attached and share your views, even these are those with whom you have spent your lot of time.wait and analys the reason for it.you will find you get hurted coz you expect they knew you very well.people may make you believe that they knew more you than yourself . whenever you will discuss about it to them .you doesn't have enough time to recognise that discussion turned into debate among you and him.Both of you will try to impose own's thought over eachother.why does it happend? Just coz "They MAY KNOW ABOUT YOU BUT THEY DOESN'T KNOW YOU"