Why hasn't she deleted me from social media?

So this girl and I liked each other and we hung out a few times. She had even mentioned to me she was single and wanted to hangout. However when I asked her on actual date she told me she was busy. Since then when I see her in person she is cold. She pretty much ignores me and doesn't talk to me. However she hasn't deleted me on social media and she still views all of stories on snapchat. If she really doesn't like me that much why doesn't she just delete me?
Why hasn't she deleted me from social media?
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