I'm a high school student, and I recently broke up with my girlfriend.  In order to console me in the immediate aftermath of the breakup, Friend X lets it slip that there is someone in the school who likes me, but Friend X will not reveal who it is for privacy's sake, and expresses that he does not want me to look into the matter.  I'm obviously intrigued, but I give myself time to recover from the breakup, and respect Friend X's wishes.  A few weeks later, I bring up the subject again, looking to find a new relationship (the breakup was after a relatively short \[although intense\] relationship).  Friend X still will not give me any details, so I begin to investigate on my own as to the identity of the mystery person.  After a bit of deduction (I talked to one friend, but I mostly "figured it out" myself), I decide that the person is Friend Y, another friend of mine who I would be interested in dating.  I ask Friend X whether it is Friend Y, and Friend X gives me no information and asks that I "act as if he never told me anything," which, to me, seems like a literally impossible task, especially given that I am somewhat interested in Friend Y.  In order to figure out whether or not it is truly friend Y, I ask Friend Z, who knows Friend Y.  Friend Z reveals to me that it is actually them, and feels irritated (though not too angry) at Friend X for partially leaking their secret.  Friend X is now upset with me, because he told me to act as if nothing had happened.  AITA for bringing the situation up with Friend Z?