What’s happening?

Just to make it short
My crush has all of a sudden gotten a bit dry on messages

We’ve been on 2 dates (haven’t called it a date) we went to lunch together and to the cinema we have had a lot of fun (she’s also said that) she has been also trying to approach me for conversations she’s laughs at almost everything I say she’s also been talking a lot about relationships and her life and likes to listen and engages in conversations but now randomly she just replies with 2 words or a gif doesn’t try to engage in conversations

Just a sudden switch is this something I should be worried about or is it natural?