Was I dating a psychopath? Help me identify?

Inhighschol I had a crush on her. Would follow her or go near her class to meet. She would often ignore me. I couldn't get hold of her as she had no friends and all her friends were from different parts of the city. Usually easy going people. Her friends in my school was a matter of convenience and thus except a max of 10 people, nobody knows her. She has no social media presence and friends of 10 years don't know her house. Mostly stuck to her studies and left.

She also fabricated a fake rich boyfriend story to avoid me filling the stories with vivid imagination. I was very heart broken as no-one till made me chase that much.

So few years back she came back. I acted like I never knew her often ignoring. She thought I had amnesia and tried her best by befriending my friends on social media to get a better hold of me. She tried to get close but not like following me to home or so. Just a casual obsession. I kept pressuring her for sex and nudes. She refused. Blocked and unblocked her for the same. I ask her out and made her stood up multiple times. Gave ultimatums. I couldn't see me in a relation but couldn't afford to see her with anyone.

Once she asked me for a threesome and I was mad at her for hooking up. So I lied I have a girlfriend and she walked away. Then I kept in touch and ghost her but she stopped responding.

Now, after 3 years, we somehow stumble upon each other as she works with me. Also by accident we meet each other a lot at mall or movies, all different places, but she barely look at me, carries onn with what she is doing and walks away. Even at work, I see her interacting with all but me. I texted her but she doesn't reply. We were stuck in elevator and she act like I don't exist.

I do feel uneasy when I see her talking to guys let alone flirt.

Is she a psychopath?

Was I dating a psychopath? Help me identify?
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