Reassurance that the other person feels the same.
It doesn't. But it feels better to hear the reply, even if not expected.
It is a question if didn't get the same answer then things change
Who says and I love you statement needs an answer?
Because women are a demanding lot. (Please note I did not say needy)
does it? and if that's a question why is it an answer
Because not every question needs an answer :)