Am I expected to tell my straight friends I'm bi if I'm having a sleepover there?

My opinion is no, I shouldn't have to tell them because I don't have any weird intentions and it's none of their business anyway. I wouldn't say I'm in the closet, I just prefer to not bring it up unless I'm asked.

But does anyone else have any differing opinions?
Am I expected to tell my straight friends I'm bi if I'm having a sleepover there?
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