What is going on?

Ever since i was a young child, one of the early lesson i had learnt was never to bring random boys home. Over the years, i have always kept to that like tradition and now i find myself in a position with a man i am not certain about because he claims we are casually dating and yet it feels exclusive.

I was in Australia for 2 months and just got home recently. He picked me from the airport and helped me with my luggage. Dropping me at home, he met my family. I just introduced him as a friend though and i don't think he liked that. Since than, he has made many attempts to come home and yet i tell him No. I don't want to bring him home if he is as uncertain as he says he is about us.

Today he surprised me with grocery shopping. He called me after work and took me grocery shopping. Then surprising me by dropping it at my door. Meeting and spending a couple hours with my parents than later playing xbox with my little brother. He just left and I'm sitting wondering.. what the hell is going on?...

Both times he came home, it was because i needed help with something. Both times he's met my family and now... they're asking how serious we are.

I've approached him about the situation and he just says its nothing serious but yet his actions say otherwise. He knows about the whole bringing home "the one" thing and he says he's not ready but he's walked through my door. Both willingly.

We've been 'casually' dating for almost 2 years now and i don't know.. i guess I'm just confused. I want us to move on to the next step and have him officially introduced to my family. I've never had a serious relationship that has ended with any of them meeting my parents. He's the only one and both occasions based on coincidence. But are they really coincidences?

Should i be reading into this? Or just wait and see what happens?