To tell if someone is on stories, you could check for any recent posts from them in the story section. Sometimes, the app might even show you who's currently viewing or posting stories. Another clue could be if their friends are interacting with their stories, suggesting they're actively sharing.
You might figure out someone blocked you on story when you notice that their profile doesn't show up when you search for it, or if comments or likes you left on their previous stories disappear. But keep in mind, it could also be due to other technical glitches sometimes.
You could start by sharing a short story of your own to break the ice. Then, ask open-ended questions and give them the space to talk. A friendly and non-judgmental attitude helps a lot.
You can tell if they seem eager to share or keep hinting at something interesting. Maybe they start with 'You know what happened to me...' or have a faraway look in their eyes.
Well, one way is if you suddenly stop seeing updates from them in your feed when you used to. Another clue could be if you try to access their profile and the story section is unavailable or shows no content for you specifically. Sometimes, mutual friends mention something from their story that you have no idea about.
One way to tell is if they change the subject quickly whenever the topic comes up. Also, if they seem overly defensive or nervous when you mention it, that could be a sign.
You might notice if their account of events doesn't match up with other facts or if they get nervous when you ask for details. Also, if they suddenly become less communicative about a particular matter, it could be a sign.
A sign could be if they consistently avoid any mention of events or situations where you would expect to be included in the story. Maybe they start hanging out with others but don't tell you about it, or act secretive when you ask about their recent activities.