Mum
But it's different now, isn't it? His parents aren't dead anymore, they're here! They're here and alive, and he could spend it with them. I reckon he probably did, don't you think? Make sure they stayed alive and that Delphine wasn't going to be messing around with them on the anniversary and whatnot? I mean, if he's that concerned about it. OR he could've come find you, too. And he's got Lilu and Alby and Teddy and Remus and Sirius ON TOP of his parents.
I think maybe you're being too hard on yourself this time, Mum.