Well, first of all, don't take it too personally. Maybe he's just going through something in his own life. You could try reaching out once in a friendly way to see if there's an issue. But if he doesn't respond, just move on. There are plenty of other people out there who would be interested in your stories.
It could mean that, but not necessarily. Maybe he's just busy or has some personal issues. Don't jump to conclusions right away.
Maybe he's just too busy right now and doesn't have the time.
She might have started reading a book.
It could mean he's still curious about you but doesn't want to engage directly. Maybe he's not ready to fully let go or he's just being nosy.
Well, perhaps they are not fully ready to cut off all connections. By watching the stories, they are maintaining a minimal level of engagement without having to actually communicate. It might also be that they are just nosy and like to see what you're up to even though they've chosen not to be present in your life actively.
He might notice that you're no longer engaged and feel a bit disappointed.
Another reason could be that she's trying to distance herself from you for some personal reasons. Maybe she has some mixed feelings about your relationship, whether it's friendship or something more, and this is her way of creating some space.
It's possible that he lost interest. Maybe your stories have become a bit monotonous or not as engaging as before. For example, if you always post the same type of content, he might get bored.
Perhaps there was something in one of your stories that made him/her uncomfortable. It could be a topic, an opinion or even just the way you presented it. So he/she decided to stop watching.
It might be that your stories have become less interesting to her. If they are always about the same topics or lack creativity, she could lose interest.