Keep going. There were too many times when Bill didn't want to keep going. Far too many. He involuntarily twitched at the words. "Yeah. Going...Sure." It was a lot better than what he really wanted to say, so he figured he should leave it there. Sometimes it was nice just to have Snape around. Snape didn't expect happiness to happen, so then Bill was able to comfortably live in his unhappiness and believe the same.
"Doing?" Bill looked at him blankly for a moment. That surely hadn't been the only word. He thought for a moment before his mind caught up. "Oh. They...want me to write." Which was stupid. He couldn't hold things. "Can't hold pens. It's not working."
He looked over for a moment at the pens briefly, frowning. "Takes so much effort to even try." And it never had before. Everything used to be easy. His mind didn't freeze up and he didn't zone out or feel so stupid.