he stop watching my stories

Maybe he was just too busy and didn't have the time.

Perhaps he's having some personal issues or going through a phase where he's not in the mood for any stories at all. It might not have anything to do with yours specifically.

Maybe he was too busy or just lost interest.

Another reason could be that he's trying to distance himself from you for some personal reasons. It could be that he has some issues in his own life that he needs to deal with and he feels that watching your stories might make him more involved or distracted, so he decides to stop.

Maybe he's just too busy with his own life and doesn't have the time.

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.

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.