Most Helpful Girl
I'm really sorry this is happening to you. I don't want to give you false hope but I did the same thing your crush did unintentionally once as something else entirely was making me depressed and I wasn't in the mood to talk.
Why don't you ask her and just say something like "You're not very talkative recently, is everything okay?" or "You seem a bit distant, I hope you're alright" or something along those lines, it might get her talking again.
Good luck and if it's not meant to be, then don't stress, something better will come along.