How to understand the sentence "You are at the top of the mountain, I am in the river, but I have to forget"?

This is obviously an unattainable love story. You are at the top of the mountain, and I am explaining the words in the river. A poet admires the people she admires, just as a river admires the top of a mountain. As for the latter sentence, it is better to understand that rivers cannot catch up. Rivers flow around mountains, but people who want to forget are always fascinated by their excellent temperament and cannot do without it. Hey, don't be picky about iron and iron! If a girl writes such a poem for me, I will reply: the heart of the mountain misses the river, too. If you have feelings, I would like to!