The story of the mermaid and the lost sailor

Once upon a time, there was a mermaid who went to a cage beneath a gourgeous cascade, to comb her hair and sing her songs in a pink afternoon.
But when she was there, a storm began. She hid in the back of the cave and stood there until the storm went away. Suddenly, the wind blew stronger and faster, and an avalanche made a big stone cover the entrance of the cave, imprisoning her.
The little mermaid was left there, and nobody ever could find her again.
One day, a ship sank by the mermaid's cave, leaving only one man alive. This man, this lost sailor, was thrown by the waves to the bottom of the cascade, and there he stayed, waiting for some ship to rescue him. But no ship was seen there.
The lost sailor, tired of being there alone and feeling a deep sadness inside his heart, started to write a poem on the beach sand. As he finished the poem, wanting to hear a voice in that desert silence, decided to say it aloud, to take away the loneliness and call for good spirits and good winds
...and she listened to his voice outside the cave, saying his beautiful words, and she fell in love with that voice, and started to sing her songs again.
...at the moment he listened to her beautiful voice and he wished to stay there forever on that beach to hear her voice.
Both stayed there, together, in love,  but without seeing each other, separated by space.
...he wrote her beautiful poems and she listened them and sang back her gourgeous songs, and their love grew strong and bright.
...and the mermaid was enchanted, and each morning she woke up and imagined what her love looked like. And for each vision she had, she invented herself again, acquiring new shapes and colour, finally losing the memory of how whe really was in the beginning.
They couldnt live this way forever, separated by space, but joined at souls, 
so she made him promise her that they will meet at last, in the other world, when they will look after each other and finally look into each other's eyes and touch.
...what happened after? ...the story wasn't written yet.