Girls, Shall I ignore her also?

I met her in lift and asked her about the exam she is preparing for, and 4 days of normal greetings and now she ignoring me for no reason.

Then after a week I have seen her with her new friend who recently joined class. Her new friend and I was in class together six month ago, and this girl hates me for no reason- on basis of rumours. I never talked to her.

Is it possible her new friend is reason for this she might have destroyed my image? Or it is some test, who can I pass this ignore test, as she is avoiding even I contact with me.

Girls, Shall I ignore her also?
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