Why does girl ask and add my snapchat again?

I had a very good vibe with a girl but after a while we grew apart. She confessed she liked me to my friend when we didn't talk anymore. She deleted me because she was mad over something and said that she never wanted contact again. Now a week later she suddenly asked my friend for my snapchat name to add me again. What is wrong with this girl?

Why does girl ask and add my snapchat again?
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