am I wrong for being sad about this

I'm upset and sad... My boyfriend told me that he stares at this one girls chest since they were huge. The girl is a friend of ours, but more friendly with him. My face showed that I was obviously not happy about what he did, and then he told me "well how could you not look at them? they're huge!". He then told me "at least I was being honest. What did you want me to do, lie?".