is he being a little insensitive?

First time posting, I've tried to talk to friends but they just don't see where I'm coming from. My boyfriend and I have been dating for almost 6 months and we just moved in together. We also just found out that his brothers girlfriend is pregnant. This is something I've wanted since I could remember, and I'm not saying I want it right now, we're not trying to conceive or anything, but needless to say I was sad, upset, jealous and just disappointed it wasn't me with the big happy news. He told his whole family how upset I was, and I just feel like nothing is sacred between us, he has to blab everything about our personal (or my personal, for this matter...) life. I'm really sad, especially now. I was doing okay today and even started to think about what I would buy for the baby shower. But his brother texted him asking how I took the news, and I told him to just say I was fine, but he told him that now I wanted one. I just feel betrayed in a way. Like my feelings are a big joke. I know he's sorry. He wishes now he didn't do it and didn't realize how upset it would make me. I just wanted my vulnerability to be for him, not his entire family.