Every time I miss you, a grain of sand falls from the sky, so there is Sahara in the world. This seems to be a sentence in a poem. What is the full text?

In fact, there is no desert in the world, but every time I miss you, a grain of sand falls from the sky, and there is Sahara in this world. In fact, there is no sea in the world, but every time I miss you, I shed a tear, and from then on there was the Aegean Sea. In fact, there is no road in the world, but every time I miss you, I take a step and there will be a road from now on. In fact, you don't have to have someone to love. As long as you live under the same sky and breathe the same air with him; As long as he is alive, as long as I know he is still alive in this world. I will live well!