They say the very first ~Fairy tale~ is the tale of:
"Cupid and Psyche"
As Legend would have it:

….Envious and jealous of the incredible beauty of a mortal girl named Psyche, Venus asks her son Cupid to use his golden arrows while Psyche sleeps, so that when she awakens, Venus would place a vile creature before her, for her to fall in love with. Cupid finally agrees to her commands after a long debate.
As he flies to Psyche's room at night, he becomes invisible so no one can see him fly in through her window. He takes pity on her, for she was born too beautiful for her own safety. As he slowly approaches, careful not to make a sound, he readies one of his golden arrows. He leans over Psyche while she is asleep and before he can pierce her shoulder with the tip of his arrow, she awakens, startling him, for she looks right into his eyes, despite his invisibility. This marvels him and causes him to fall deeply in love with her.
He cannot continue his mission, for every passing second he finds her more appealing. He reports back to Venus shortly after and the news enrages her. Venus in turn places a curse on Psyche that prevents her from meeting a suitable husband. Cupid is greatly upset, and decides that, as long as Psyche remains cursed, he will no longer shoot arrows, which will cause the temple of Venus to fall.
...After months of no one (neither man nor beast) falling in love, marrying, or mating, the Earth starts to weaken and grow old. This causes concern to Venus, for they no longer praised her in result of Cupid's actions. Finally, she agrees to listen to Cupid's demands, allowing him his one desire,
which is Psyche.
Venus, upset, agrees to his demands only if he begins work immediately. He accepts the offer and takes off, shooting his golden arrows as fast as he can, restoring everything to the way it should be.
People again fall in love and marry, animals far and wide mate, and the Earth begins to thrive and look young once again.

...and so it shows...
.. Everything there is on this Earth... the entire balance of our existence  -revolves around Love.
What is there if there isn’t Love? Even Love needs Love.
The very first fairy tale shows us what we already know:

"All you need is Love. Love is all you need."