One could be 'Lovel'. It was once a story of great love, but then one person left, and the love died, leaving only the sad memory of what was.
Sure. 'Grief'. It could be about a person who has lost a very dear friend or family member. They are constantly in a state of grief, and every day is a struggle to come to terms with the loss.
The dog died. Boy was heartbroken. It was his best friend, always by his side. They played every day. Now there's just emptiness.
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.'
Well, 'saddle' could be a six - letter word in the 'Witness' novel. Maybe it's related to a journey the characters take, perhaps on horseback. Also, 'gossip' might be there. If the story involves a community, there's bound to be some gossip among the characters which can drive the plot forward.
Love. It might seem strange as love is often associated with positive feelings, but in a sad 4 - letter story, it could be unrequited love. For instance, a person loves someone deeply, but that love is not returned. It can lead to heartbreak and a great deal of sadness.
How about 'Hello'? It's a common and simple six-letter word that ends with 'o'.
One common theme is loss. For example, losing a relationship, like a friendship or a family connection, as in the case where people believe not forwarding the chain letter leads to estrangement.