Have you ever heard someone say one thing and then do another, and asked them why?
You may have been shocked at their reaction...
“Don’t judge me! What are you accusing me of? How dare you ask me that!” and immediately began to apologize for asking, as your intention was none of those things.
You just didn't know why they said one thing and did another.
Sometimes, it’s just a sensitive subject. Other times many times, the reaction comes from them judging themselves, being afraid of being caught in a lie, or trying to hide something.
Stay aware, and realize that if you can’t freely communicate, this may not be a healthy friendship or relationship for you.