We all have best friends. A friend with whom we share all our secrets. A friend who is special to us than all other friends. If for a boy there is a girl who is his special friend and with whom he shares all his secrets, but then sooner or later the bond you once shared starts to fade way there might be many reasons, may be either of you start falling for other one because at times in close friendships caring gets confused for feelings.
Girls and boys can never be 'Just Friends'. True it is.