If someone had said to him even six months ago that he would willing go live in a Muggle household, he would have called that person barking mad. But times have changed. It’s not that he wanted to return to Malfoy Manor, even if he could. All his family was either dead or in Azkaban. The closest thing to home he had was Hogwarts and he couldn’t even return there. May be that’s why he came to his father’s grave. It’s not that he particularly cared if Lucius Malfoy was dead or not, he just didn’t want to be alone.