Dating

My friend flirts with my crush and she knows I like him What do I do?

My Friend knows that i like this guy (Noah) and she has started snapchating him and talking to him. She already is dating another guy, but she is a natural flirt. I have mentioned to her a couple of times that she better not start liking him because he used to like her. He seems to flirt with me, but she doesn't stop talking to me. What do I do?
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Yes, she can be not a very good friend. Me, Noah, her, and another friend are hanging out after school on Friday. I think i will see what happens.
My friend flirts with my crush and she knows I like him What do I do?
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