A girl I like used me what should I do next?

A girl I liked from work kinda used me. The first time I asked her out she said she is busy and will let me know, and obviously never did. Second time I asked her out she agreed and flaked, but she keep showing me fake signals in order to keep the attraction and get the attention from me. I wanna stop looking at her or thinking about her, but it is tough cause we see each other at work everyday. What should I do next? should I try break her ego and not look at her and cut all communications, or just keep being nice but not show any intention of attraction? she is a player and she used me, so please don't judge me...

A girl I like used me what should I do next?
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