He Doesn't Want You to Meet His Family & Friends
Unless he just moved to a new city, if you've been dating for at least a few months now, and you have yet to meet any of his family or friends, odds are he’s too embarrassed to bring you around or simply doesn’t want to invest that much in your relationship. This is especially true if he doesn't at least introduce you to a few of his friends. I say this because he could have some family issues that he is ashamed of and doesn't want you to know anything about. We cannot choose our family, but we do choose our friends.