What is eternity? I'm just saying. What are the lyrics of the song title?

Zhang Zhenyue's Experience of First Love If you say you want to leave me, please tell me honestly and don't sneak away like last time. If you really want to leave, it's no use giving you my photo back. I can give it back to my mother forever. Just tell me the fact that you love me, but you can't tell it. Leave me alone when you meet a handsome guy. Like a cold winter night. I want to buy wine to drown my sorrows, but I am lazy. I don't want to go out. I wonder if I am under 18 years old.