It may not necessarily be about boredom.
If she has been making no effort to keep text conversations going and doesn’t ask questions, she may not be interested in you romantically.
Though she may reply to your texts in less than 30 minutes, this is not a true indicator that she sees you as someone of romantic potential.
She may just like the attention.
To get a better idea on whether she likes you romantically, try changing the kind of texts that you send her.
Perhaps start by asking her to tell you something about herself that you don’t know already.
If she doesn’t give you a wholehearted response, there may simply be no romantic interest on her part.