Bring about the nature imagery in the poem

The speaker explains that he is writing his poem on a windswept, starry night identical to one he spent with his lover. He seems to feel perplexed and shocked by how much his romantic circumstances have changed, when nature remains totally unchanging. Because nature remains constant while people change, the speaker is able to make use of the natural world, the wind and the stars helping him assess and measure his changing situation. Yet nature's seeming apathy is also distressing to him. In fact, it appears to make him feel mildly insane or unsure of reality as he attempts to reconcile the peace of nature to the tumult of his own life.