Why would a coworker lie and say she never uses Facebook even though you know she does?

[505]

then when confronted about why she did not add you to her friends list, say that she only adds family, But then when you tell her that she knows other co-workers are on her Facebook page, make up an excuse as to why they're on there.

[Adam]

She doesn't like you at all, or she is involved with things that she wants to keep from you.

[Taylor]

Put it to the test. Have a co-worker that is not friends with her, friend her. If she accepts, take pictures and show her the evidence.

[Kiyanni Lewis]

She doesn't have to add you.