Guy behaviour help?

This guy I used to have a crush on at work used to watch my Instagram stories all the time. Suddenly, I decided to stop watching his so as to not get too attached again (trying to move on). I then realised that he no longer was watching my stories, the same time I wasn't watching his. Then, I decided to just watch his story after about a week or more of not watching them and then all of a sudden I see he has watched mine for the first time in nearly 2 weeks. I thought it was really, really strange. He isn't the type of guy to do immature things like that but it all seems a bit fishy to me and coincidence. Can someone help me? Why could this be?
Guy behaviour help?
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