How does the dumper feel?

So my ex broke up with me for unknown reasons, I heard the same excuses “ it is not you, it is me. Or. I am not ready for a relationship” so I have feeling like shit for the past 2month. However, we cross roads in collage and she seems really happy
So is that an act in public or is she really happy without me. And does she really don’t miss me after 8 month of dating
How does the dumper feel?
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