Is it okay for your boyfriend to expose your weaknesses to his friends right in front of your face?

He announced loudly to his friends weaknesses that I have which only he knew. I know I have no excuse for my flaws but I still can't help but feel hurt and betrayed. My dad and I have had problems between us, and no one knew this but him because my parents often invite him into our home, so he is able to observe and see everything. I let him see the imperfect side of me and my family because I trusted him, but why did he have to go and expose it all in an obnoxiously loud and almost boasting tone to his friends, and he did it all in my presence too? He sounded aloof and derisive when he was telling his friends about me and my dad, and all the while referring to me in the third person, "HER dad this and that, SHE doesn't this and that", even though I was sitting RIGHT THERE next to him. We have been dating for three and a half years now, but I swear at that moment I felt like I didn't know him at all. I just felt like I wanted to cry....