Girl responds late? (Love, love and relationship, friendship)

I added a girl on snapchat two days ago and wrote to her, then after almost 24 hours I got an answer. We then wrote into the night and I’ve been waiting for an answer for 16 hours.

Is she doing this just to be interesting or is she just not in the mood to write to me?

(We did not write through but only after 10-25 minutes. An answer came, etc.)

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