How does it feel working with your ex as colleague?

We broke 2 years back. She tried to work things but I was adamant. From then it was more like one text and the other ignore. One night I saw her and she moved past like I don't exist.

Now she joined my company. Her personality took a full shift as she is now more open to communication with people, less drama, hyper independent, clothes changed from casual to business casuals and formulas. She is more like a fashion trend setter without any effort. Also very efficient at work.

Sadly I work in the same department and floor and we meet on a daily basis. Though we don't work on the same project, she straight up ignores me while enjoying attention from everyone. As in go out of her way to ignore me. Also I have seen all unmarried men are attracted to her like moth to fire.

Now I came to know from one of her managers that she is now in a relation with a rich dude. It is an open relation as I have seen him flirting with others while she come, work and leave.

How does it feel working with your ex as colleague?
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