Perhaps they don't want to clutter their follow list but still enjoy the quick updates from your stories. Another possibility is that they're a bit shy or private and don't want to be an obvious follower but still like to keep up with what you post.
It might also be that they are in a situation where they can't or don't want to publicly follow you. For example, if they are part of a group where following certain people is not the norm. They still want to see your stories though, as it gives them a glimpse into your life or the things you share without the commitment of following. This could be someone from work or a more formal social setting.
Maybe he's just casually interested in your stories without wanting to fully follow you. He might not want to seem too eager or committed by following.
There's a possibility that he's just casually browsing. He might not follow a lot of people but still checks out interesting stories when they pop up. Another reason could be that he doesn't want to be inundated with all of your posts in his feed if he were to follow you, but likes the quick and ephemeral nature of stories.
It could mean that they still have some level of curiosity about your life. Maybe they're not ready to completely let go, but also don't want to fully engage by following you. It's like they want a little peek into what you're up to without making it obvious that they're interested.
There could be several reasons. Maybe they just want to keep an eye on your updates without having your posts constantly in their feed. It might also be that they haven't decided if they want a more involved interaction with your account yet.
Well, perhaps they don't want to clutter their following list but still enjoy the snippets of your life or information you share in stories. Another possibility is that they're not sure if they want to fully engage by following but are curious enough to check out your stories from time to time.
It might be that she is shy about following you. She could be interested in you or what you post, but for some reason, she doesn't feel comfortable with the idea of following. So, she just watches the stories as a way to keep in touch without making it too obvious. For example, she might be worried about what others would think if she followed you.
It could mean she's just casually interested in your content. Maybe she doesn't want to commit to following you but still enjoys seeing what you post from time to time.
It could mean that they still have some interest in your life but don't want to be too obvious by following you. Maybe they are just curious about what you're up to without fully committing to reconnecting.
It could mean that they're still curious about your life. Maybe they're not ready to fully let go yet, but also don't want the commitment of following you.
Don't overthink it. They might just be passing time and your stories caught their eye.