Why hasn't he unfollowed me?

So I went on a date with this guy I met on a dating app. Shortly after he started to ghost me and then randomly texted me again a couple weeks later saying he had been busy and all that. He stopped texting me completely again, but I noticed that he still follows me on Instagram and sees my stories but has been deleting a bunch of other people on his Instagram. If he is trying to ghost me, why wouldn't he just fully delete me as well? Am I just over thinking this?
Why hasn't he unfollowed me?
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