Should I let a casual friendly smile I made to a black guy go further?

So, I was waiting on this well dressed black man, me 32f white, he is like 50ish and black but well dressed and nice mannered. I delivered his lunch to him and i noticed he was checking me out with a smile on his face so i smiled back.

He already asked if i am single and available? I feel like I am weak around such guys. I want to get to know him but i know where it will lead, I think. I hate to admit that i like his attention. Why do i try to deny that I want some attention?

Should I let a casual friendly smile I made to a black guy go further?
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