He didn't know why it was so hard for him to accept Lupin's sympathy. He just... couldn't. He didn't know if he wanted to be pitied. He didn't know how he wanted people to react to news of his death at all. He had never thought that he'd have to share with people what he had tried to do (let alone died doing.) It was ridiculous. Instead, he merely shifted a little on the couch, still pointedly avoiding Lupin's gaze. He knew that he could get up and leave. But he didn't. He didn't know why. Maybe it was the simple fact that this was still the most civilized conversation he'd had in awhile.
He didn't know what to do at all when Lupin shared his story. He didn't know what to say. It seemed terribly personal and he didn't like it. Still -
"Have you opened any of your luggage yet?" Regulus asked. If Lupin wanted to share, that was fine. He wanted to do exactly what was in the luggage that had come with them that had worked Severus and Sirius up so much.