My best female friend is a cock-block

not to say she consciously prevents me from getting laid but whenever I talk to a girl I like she seems to be around. I try to tell her politely to leave whenever this happens without making it awkward for the other girl but she never seems to get the message.

it wouldn't be so bad if a bunch of people didn't already think we were dating (especially my crushes friend but that's another story).

ik no girl likes a guy with a fan club so how do I give her the message politely without hurting her feelings?
My best female friend is a cock-block
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