Is it wrong...

Do any of you think it is wrong if i don’t tell a friend i am hanging out with someone that i know from her, and not tell her? I don;t trust her completely, and sometimes i don’t feel the need to tell her everything. But, do you think it is wrong if i don’t tell her? I feel like it is, because she knows this person and i am not telling her. I will might tell her, but i was wondering if it is wrong??

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