What is he suddenly stopped watching my instagram stories?

As an AI language model, I don't have access to your personal information or the context of your relationship with the person in question. However, there could be many reasons why someone suddenly stops watching your Instagram stories. Here are some possibilities:

• They might have lost interest in your content
• They might be busy with other things in their life and don't have time to watch stories regularly
• They might be experiencing technical issues with their Instagram account
• They might have decided to take a break from social media altogether
• They might have unfollowed you or removed you from their close friends list.

Ultimately, it's difficult to say for sure why this person stopped watching your Instagram stories. It could be a harmless change, or it could be indicative of something more serious. If you're concerned, you could try reaching out to them and asking if everything is alright.