How do I turn down a date without any complications?

I got a very nice job and my silly self flirted too much and now the owner of the company asked me out on a date, I am not interested to go out, I was just flirting because I like flirting.

I have to somehow find a way to get myself out of this situation and still be able to not hurt my job.

Updates
11 mo
I don’t want to date him.
How do I turn down a date without any complications?
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