Why is she acting like this?

I used to like this chick I worked with and she liked me too. I ended up ruining things by giving her too much attention which turned her off. She strung me along for a bit i caught on to what she was doing decided to move on and stop giving her attention. At first she started ignoring me (which was fine ) but then she even got worse when she started trashing my locker ( I didn't know it was her at the time and only

realized when she quit ) A few weeks later she comes to buy things at the store and as I'm cashing out customers I can feel eyes on me she even comes closer to the register for me to see her then she stands to the side and stares at me. I ignore her and continue working

I don't understand how this woman hated me enough to trash my locker, ignore me and now she's staring at me trying to get my attention.

What does she want from me?

Why is she acting like this?
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