Why is he asking about my husband?

A guy who used to be like me years ago added me on Snapchat. We used to be really good friends. We’ve never dated but he’s told people he used to like me. He was stalking my stories for a while then messaged me asking me “how long have you been married” then proceeded to ask about my husband. He’s not not read my last message for 3 days but viewing my stories. What’s up with him? Is this normal? We are both married with children.

Why is he asking about my husband?
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