Texas DPS, which instructs the CHL instructors, said in my training class that in their opinion (granted they are not lawyers but they are the legislative body that issues CHL's) you should not tell anyone you are armed because according to them, it is then no longer "concealed."
they cited an incident between two citizens arguing over a parking space. one had a CHL and was carrying. the second citizen noticed a bulge and asked him if he was carrying a gun. the CHL holder said he was carrying a gun but never threatened to use it, nor did he brandish it or display it.
DPS showed up and arrested the guy because it was no longer "concealed."
personally i think that is a bad arrest, but they used it as an example in my CHL instructor class.
my advice is to tell only your significant other or whoever you may be with, so if they brush up against you they don't blurt out, "oh my are you carrying a GUN?" or something equally stupid.
if someone asks you, who you don't know, if you are carrying, you can either say, "No," "None of your business," or even "Maybe," or act like you didn't even hear it. neither of them are a "yes" so really none of them can get you into trouble.
oh yeah also remember that you have to let LEO's know if you are carrying if you are being legally detained (in Texas).