What poems can be used to express feelings when leaving friends?

After reading all the bitterness of leaving this world, there are still so many scattered flowers that do not return. Flowers have nothing to say, and the green window is spring. I will tell you under the acacia lamp that I have new love and old hatred for Qian Qian. Most importantly, the world can't stay, and Zhu Yan's words are reflected in the mirror. The meaning of this poem is probably: travel all over the world and see all human feelings. Unexpectedly, when I returned to my hometown, my old friend had fallen like a flower. Recalling the parting with her at that time, I was relatively speechless, leaving only sadness and parting thoughts. Now, only the green window remains, but it is not the scenery at that time. I want to tell acacia in detail under this firefly lamp. The new man is like jade, but to whom is the old man helpless? If I had known that all the good things in this world were not long-lasting, it would have been difficult to last. If the mirror is empty, where can I shine? Just like falling flowers, only empty branches make me lonely.