When I ignore her, she notices me?

My crush and I have been talking for like 7 months. She used to respond everyday but now it she only responds a day or two later. When she does, she doesn't always apologize. But she gives lenghty responses.

One night, I ignored her texts and the next day, she double-texted me to see if everything was alright.

Is she playing a game? If so, should I keep delaying my responses?
When I ignore her, she notices me?
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