oral sex

My bf told me last night that he doesn't like going down on me because he doesn't like the taste. It's been about 6 months since he's done it. Obviously I was very upset to learn this. I started wondering what else he hasn't told me. Over the past few weeks he's been a bit distant. The issue I'm having is I am very upset and I just don't know if I have a right to be? I keep thinking about how I'm always gonna wonder what he is really thinking when we are intimate.