Just because he is your boyfriend doesn't mean he has to tell you secrets he's gotten from other people. Secrets are meant to be kept confidential.
If you were to tell someone something that involved another person, would you automatically assume that the person is entitled to tell their significant other? Nope. At least I hope not. It would suck to tell my friend a secret about his girlfriend, he tells his girlfriend, and then she's obliged to tell her best friend, and so on.
Perhaps your boyfriend doesn't want to tell you because it has to do with you and like little pingoin said, it may hurt your feelings or open a can of worms.
no autographs, please!
The more I see, the more I don't know for sure. - John Lennon
Life is ... Too Short.
"It seems we living the 'American Dream', but the people highest up got the lowest self-esteem. The prettiest people do the ugliest things ... for the road to riches and diamond rings."