I think you are right to be irritated. It wasn't their business to tell her that you had feelings/ a crush on someone else if you were not having a relationship with that person! You had trusted your friends with this information they should have realised it was not for sharing.
Now it is likely that they didn't realise it would be a problem so you might want to gently tell them that you thought it was inappropriate of them to tell this girl, who at the time you had never met, intimate details about your life or who you fancy and that you would be grateful if next time they'd refrain.
To be fair, if it was me, I'd be fuming!
