Hi Bumbly, my DS, now 19 months, did this to me too, he didn't just ignore me either, he'd cry, hit, pinch and it really, really upset me. Particularly noticeable when I picked him up from nursery in the evenings.
I reiterate everything everyone else has said, I'm sure it will be a passing phase. Apart from amything else, at a year old, they simply don't see things in the same way as we do, to you, he is ignoring you, to him, he's just not paying you any attention, its certainly not malice on his part, that's far too complicated an emotion for him to understand (yet!).
You are part of the furniture right now, always there, never changing, always consistent in the way you treat him. I promise you, very soon, he will see you as his favourite plaything, sure, he'll still have fun with his granny and dad and uncle tom cobbly and all....but it will be you he runs to with his grazed knee, or when a loud noise scares him, you that he wants to play chase or tickle or whatever with.
Just continue being consistent in your love for him, offering cuddles and kisses when he'll let you...soon enough he'll be dribbling on you kissing you and demonstrating his affection in the same way that you do!