Why does my ex still look at my snapchat stories?

So he broke up with me on my birthday in a really harsh way and i was like "ok, i wish you the best of luck" bc i didn't want him to think i gave two shits (excuse my language) and now he looks at every single snapchat story and its been like 3 months. Why is he doing this?
Why does my ex still look at my snapchat stories?
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