I just hope it's not because of me.
Ouch! That's a morbid thought to dwell on! You have to wonder how often in the day a stray thought like this crosses his mind. When he saves a stranger, does he think about his loved ones? How often can he obsess about that fear before it drives him crazy? No wonder he broke up with Lois "for her own good" if he constantly connects being part of his family with being in danger. Poor guy.
Susan, who's willing to do her civic duty and take his mind off of his problems for a while.