My male coworker and I hung out for 9 hours in person just talking & getting to know one another, is this a sign he may like me?

To be clear, we’ve only hung out one other time but I was in a relationship back then. Now, 8 months later we hung out on my birthday had a couple drinks and chatted 8 hours straight no pauses. Is this a sign he may like me?
My male coworker and I hung out for 9 hours in person just talking & getting to know one another, is this a sign he may like me?
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