初恋还没开始就已经结束
[chū liàn hái méi kāi shĭ jiù yĭ jīng jié shù]
Means 'The first love hasn't even begun yet it has already ended', representing someone who experienced short-lived first love that did not develop or last long at all. It shows a feeling of nostalgia, melancholy about an immature love story or an unspoken affection towards someone.