What does it mean when he randomly liked my old IG post?

I got a notification that he liked my post. I didn’t post anything new in a few months so I was confused. Then I saw that he liked a post since way back in 2019.

He didn’t message me or anything, but does this mean he’s hinting that he wants to chat? Or am I simply overthinking?
What does it mean when he randomly liked my old IG post?
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