I (29F) fantasize about cheating on my bf with a successful man

I fantasize about going to a bar and having a drink alone. And a successful man in a suit sits beside me and starts talking to me. We drink, talk for hours, flirt & see where the night goes. I have never cheated before, ever. And it’s all I can think about lately, it’s driving me crazy.
The thought of a well dressed, successful man pursuing me and flirting with me just makes me go crazy.