Boyfriends Friends

I've been with my boyfriend for roughly two years, but I haven't actually met any of his friends. He introduced me to some on his baptism, but that was it. Is this something I should be concerned about? He said he doesn't feel it's necessary. And he thinks that I will lust over them? I always thought when someone was serious about you they show you off not hide you away. Overall we are in a great relationship, but I feel no one including his family knows of our relationship. I don't just want them to see me as that girl because we are serious about each other.