Is it weird?

I'm 17 and have been with my boyfriend for 4 months. He's met my whole family, and a fair few of my sister's and brother's friends. I've met two of his best friends and met his uni rugby team at the same time he did, but I haven't met his family yet. Is it weird? He's 19, but still living at home for uni, so there's no real reason for me not to have met them yet. Admittedly, he met my family way earlier than he should have (like 2/ 21/2 weeks into dating) but I'm worried that he doesn't want me to meet them. He's said that it's because his 'rents want to know it's serious before they meet me, but I think it's serious now- he stays over every weekend now, and I just don't get why I haven't met them yet... And now when I do meet them, it'll be a huge thing... Idk, apparently I'll meet them when we've been together 6 months, but I don't want to wait that long! Any thoughts will be welcome!