Sooo annoying!

So this is like one of the most common thing that is wrong in every relationshp. My boyfriend gets pissed when I talk to other guys at work or his friends, even my sisters friends. He will be calling me names and stuff. . When he talks to girls like my friends, his siblings friends, or someone he works with, it'll be no big deal for me. But only when I talk to other guys I'm a whore. Ugh! Pisses me off so much but yet so understandable!