now i got option to add friend. previous request was converted to contacts only. now this request made us friends.
when she registered i had sent a friends request --- she accepted. but that was not displayed in friends list. she was added in contacts only.
now after she had some posts, again i sent a request --- she accepted. now she was added to friends.
my problem solved.
just because of zero posts ..... unable to add as friend instantaneously.
thank you ...