Partially.
The interesting thing about knowing Bill for so long is you learn pretty quickly that he’s just as human as anyone else, no matter what the media says and no matter how hard he tries to act like he’s not. So with that said, he can sometimes get a little jealous.
Whether he’s jealous of A) Steven in general, B) Steven because I pay a little more attention to him than to Bill when we’re all in the same room, or C) me because Steven pays more attention to me when we’re all in the same room is something I’ve never been able to figure out. I could ask him, but … you’ve seen how he acts whenever you ask him about his interests. It’s just as bad behind closed doors.
Edit: Really, Bill? This is what gets you to text me?
The Pokédex According to Bill 