There could be various reasons. Perhaps they're dealing with personal issues and don't have the time or energy for social media. Or, they might have changed their preferences in the type of content they like to see. It's hard to say for sure without communicating with them directly.
Maybe they're just busy or not in the mood for social media lately.
It could be that they don't have the time or maybe they don't want to think about the past and seeing your stories reminds them. Another possibility is that they have new things going on in their life and have less focus on social media in general.
Maybe they just lost interest or are too busy with their own life.
Well, maybe I just got too busy lately. There are so many things going on in my life right now, like work and other personal stuff, that I don't have as much time to check out stories as before.
Maybe he lost interest. People's interests can change over time. He might have found other things more engaging or he could be busy with his own life and doesn't have time to keep up with your stories anymore.
Maybe he was just too busy and didn't have the time.
Perhaps she had some personal issues or distractions that prevented her from giving your stories the attention they deserve. It might not have anything to do with you or your stories specifically.
Maybe she's just too busy and doesn't have the time right now.
Maybe he was too busy or just lost interest.
It could be that he wasn't finding your stories interesting anymore. Maybe the content didn't appeal to him or got repetitive.
Perhaps there was something in your recent stories that turned him off, or he might have some personal issues going on that are affecting his online behavior.