I'm really confused?

I've been seeing a girl for a month now and we've been out on like 7 dates. She told me that she likes me and i told her the same and when i meet her she's super cool and acts really interested. But what confuses me that she's another person over text. She have late replies, sometimes she don't respond and she's a dry texter and she rarely initiate a conversation unlike real-life.
I'm really confused?
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