When she doesn't respond I text her back like two days later and acts as if nothing happened and acts excited (exclamation mark, etc)
Seems like she wants to do the minimum while keeping her options open.. I'd move on if I were you.
Its possible she really likes you and doesn't want to seem desperate or too clingly by always responding to everything you say or she's not interested and is being nice. I would just ask her about it and tell her it doesn't bother you if she is trying to not seem too clingly with always trying to text.
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