My boyfriend doesn't like my one friend. And I still talk to him without telling my fiance then is it ok?

I have a friend whom my fiance doesn't like but I still talk to him secretly and we have a good bond. I don't have any feelings for him he's my only friend and we talk like a friend only. Am I doing right? If I tell my fiance then he'll get upset.
My boyfriend doesn't like my one friend. And I still talk to him without telling my fiance then is it ok?
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