<human>: Can you condense the text into a few key points?

As said before, my boyfriend [18] and I [18] have been dating for a year and a half. We are both party of a singing group at our school, which we have many gigs for. Today, Memorial Day, our group (20 of us), went to sing at the different memorial services in our area. The last place we went to fed us lunch, and around six of us were sitting at one table talking about psychology class. My boyfriend inappropriately brought up me self-diagnosing myself with OCD, which he promised he would never tell anyone (only two other people besides family knew). I had an anxiety attack in front of everyone. It's a very sensitive subject for me. I don't know what to do. I'm lost and feel betrayed. I haven't spoken to him much since and he doesn't seem bothered at all by it, or care about how what he did hurt me.
<bot>: My SO told a large group of people a secret of mine that only a few people know. I had a large anxiety attack in front of everyone. He seems unaffected by the situation, and I don't know what to do.