Why am I possessive of her even though she is boring?

She was boring and monotonous. So I ignore her. However I do feel anxiety and panic when I see her talking to others or when her phone is busy. I feel very possessive of her body and that should be just mine. She would beg, pleade and even try talking to my friends to convince me (I did gaslight her when she broke up with her guy which messed real bad resulting this).

I am ok with male- female company and even I have friends who are girls. But I can't stand her male friends.

But NOW in office, she is a new person. All boys love to hang out with her coz she is the most easy going manager. I have heard guys say friendship to her as simple bromance filled with good conversations and laughter. She is incredibly attractive as well (as always). But she ignores and avoids me and no one knows about us. She just doesn't even acknowledge knowing me ever. But Im incredibly uncomfortable when guys talk to her or when I see them laughing at the cafe or smoking.

I a okay when girls smoke or drink but just not her.

Why am I possessive of her even though she is boring?
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