Why does she pretend not to notice me?

Answer 1

A girl may pretend not to noticed someone is she likes them. Usually this is a result of her being shy and being afraid of rejection. She is most likely waiting for her crush to talk to her.

Answer 2

There could be several reasons why she pretends not to notice you. She may be shy, uninterested, or unsure of how to act around you. It's important to communicate openly and honestly with her to understand her perspective.