Is he uninterested?

Gave this guy I like my number at work. We’ve had chemistry since we met and it’s obvious in both our eyes. Well, at least in my opinion. I know he likes me, asked if I had kids and if I was single. Days later I gave him my number. He didn’t text the same day or the next day… although he did say something came up he had to deal with but he was going to text me. Is there some 3 day rule when a guy gets a number he text? Or is he uninterested.

Is he uninterested?
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