He put his hand on top of mine, is that flirting?

I had my hand on the table and we were with two other guys ( we all work together) and my crush looked down at my hand. And put his hand deliberately on top of mine. I brushed it off and he said "ohhhh. I was just trying to chill". Don't know what that means.

Was he flirting or?
He put his hand on top of mine, is that flirting?
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