One: 'Birthday cake, only one candle.' It implies loneliness or a sense of loss perhaps on a birthday. Another could be 'Found love, then lost in war.' This shows the cruel disruption of love by the horror of war. And 'They left, took my world too.' Here it conveys a deep sense of abandonment and the resulting emptiness.
Well, '13 sad six - word stories' might be a set of very concise tales that capture the essence of sadness in just six words each. Some could be related to death. For instance, 'They left, and I'm still here.' Or it could be about broken dreams. Say, 'Dream shattered, hope disappeared.' There may also be stories about the pain of separation, like 'We parted, heart in pieces.'
Parents gone. World feels empty. Without their love and guidance, everything seems so different. Their presence was like a warm blanket, and now it's just cold and lonely.
The fact that they are concise yet full of emotion. Take 'Friend left. Silence filled space.' It's a simple statement but it can evoke a strong sense of loneliness and loss. We can quickly picture the situation and feel the sadness because they cut straight to the core of the feeling without any fluff.