"She's...maybe she feels the way Laura does. That I should..." He paused, trying to recall Laura's words, "man up. Deal with it because it hurts Marian more." Maybe she did think he had left her to her hurt. Even though that was exactly what she'd done to him. They both tended to seek solitude when they were upset.
"This is enough. Without anything else, this is enough." Even if he'd never buried another soul before in his life, this would have been too much.