Are Birthday Wishes Necessary?

Celebration of birthday party cutting cake with grand feast All gusts enjoy most saying greetings and wishes to the host; Being all familiar with social media, all wishes and all Sorts of greetings are conveyed there itself sans meeting! Even to do that, many forget close personalities too often; It seems saying birthday greetings and wishes too not at all Necessary as no one pays much importance to that after getting All benefits and forgetting the persons familiar once.....! Even after saying a blessing, wishes and greetings to some, There is no response from other side as if the greeter is A stranger though known and commented many times on Facebook; What kind of relationship is this?A question is nagging now! Can this be a friendship at all fostering love and goodness As humans of high sense far better than animals or plants?