Love, maybe I once had it, but I don't have it now. I am a snail, carrying a heavy shell on my back, moving slowly. One day the snail met love, and it was very happy, but love told it, I have to go, see you next time. The snail nodded, then got into its shell and cried alone. It did not dare to ask love to accompany it forever. It did not want people to see its weakness, so it got into its own shell and did not dare to come out. It was afraid that when it came out, it would meet love and be abandoned again. So