Understandable. Everyone suffers from such a feeling at some point in their time here. Strength can only last for so long after being chipped away by faceless beings. At those times, it would be impossible not to find yourself with such thoughts. The most crucial moment is what happens after that...

[He turns his head to look at her.] Do not judge yourself as a selfish person until you decide whether to face those difficulties... or to run away from them.