Why would a girl stop watching my stories?

Before you read anything into the stories, look at the actual conversation. If she is still replying to you with some warmth, the story drop almost always means nothing. People stop watching stories all the time for reasons that have nothing to do with you, like a feed algorithm change, a muted account, or just a busy week. If the texts have also shrunk to one-word answers or gone cold, then the stories were probably one of the few remaining threads, and it is worth treating the whole channel as weak. The distinction matters because the fix is different. A slowing conversation needs a better reason to talk. A stories drop with a live conversation needs nothing at all.

The instinct when someone stops engaging with your content is to make the content better, so you post more often, funnier, or more personal. This quietly turns your stories into a way to get her attention, and she can usually feel the pressure in it even if she doesn't consciously register it. Stories work best when they are things you would post anyway, for your own audience of friends and whoever happens to look. If you find yourself choosing a story because you think she'll like it, that's the moment to stop. The goal is to move the connection somewhere she can respond to you directly, not to win a view count.

If you have not heard from her in several days and the stories have gone quiet too, the length of the gap tells you more than any single message will. A short silence after a good exchange is normal and rarely means much. A week or more with nothing from either side usually means the energy has shifted. At that point one clear, friendly message is enough, and whether she answers it is the real information you need. Do not send a second one to cover for an unanswered first. Let the single message stand, and let her response decide what happens next.