Why does my ex flirt with other guys right in front of me when she broke up with me?

Anonymous
I've been dating this girl for 3 years (pretty much all of high school) We broke up 2 months ago and I still have feelings for her. She flirts with my friends and other guys right in front of me and I know she does it on purpose because she looks at me and then continues flirting and laughing. Why does she want from me? And she asks me if I like anyone, what do I do?
Why does my ex flirt with other guys right in front of me when she broke up with me?
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