I usually take my time replying to texts.. but this is a peculiar situation.

This plate I contact mostly over text, she is kinda cute but has very wierd texting pattern.. we are chatting plans for the weekend and she replies in one min and is online too. Seeing her reply fast, I reply back to her then, but she goes away for some 12 hours during which she is also online I can notice... Is this some kind of trickin bullshit? Usually I text back with long delay and I only reply to her after some 6 hours, but since she replies fast I text her back and then she kinda leaves me hanging there... Its like she is afraid of having a long conversation

How do you guys deal with this nonsense?