It could indicate several things. Maybe she's got a lot on her plate and doesn't have the time. Or it could suggest that the content of your stories isn't resonating with her anymore. Maybe there was a misunderstanding or something you posted that rubbed her the wrong way.
When your ex stops watching your stories, it could imply that they have emotionally distanced themselves from you. It might be that they don't want to have any reminders of the past or they're consciously avoiding any interaction related to you. However, it's also possible that they just got busy or lost interest in social media in general.
It might mean they're not interested anymore or they're just too busy.
It might mean he's lost interest or is too busy at the moment.
It could mean she's lost interest or is too busy. Maybe there's something about the content that doesn't appeal to her anymore.
It could mean he's lost interest or just busy. Maybe he's going through something and doesn't have the time or mental space for it.
It could mean they lost interest or were too busy. Maybe the story didn't capture their attention or fit their mood at that moment.
It could mean they've lost interest. Maybe they started seeing someone else or just realized they don't want to pursue anything with you. For example, they might have met someone new who takes up all their attention.
Maybe you should think about whether the content of your story wasn't engaging enough or if there were presentation issues. Then make improvements for the future.
It could mean she's interested in you or just passing the time. Maybe she finds your stories entertaining or wants to keep up with what you're doing.
When a girl watches your stories, it might indicate that she's paying attention to you and wants to know more about your experiences or thoughts. It could also be that she's just passing the time and your stories caught her eye among others.