Same is the case with me. But, you too need to understand him better. Just a mere Facebook status doesn't mean a lot. If his family doesn't know about it, you sholdnot insist on him to chng his status. This may also hamper ur image, he might start to think u r too possessive n donot undstnd his feelings n prblms, n may loose intrst in u. it might even hurt him. N c'mon gal, u too won't like ur relatives n acquaintances to question u or him, or to keep an eye on him secretly, would u?
Spend more time with him. Get to know what is the actual reason he doesn't wanna do it, n then resolve the prblm.
Donot fight upon unnecessary matters. I can say this from experience, the more u trust him, the more he loves u back. The more u give him his space, the closer he will be!! :)
Goodluck sweetie... :)