She is waiting for him to propose, with the rationale that given his dangerous job, she likes the idea of him having to think of her, to hesitate for a while before jumping into danger. He, on the other hand, is waiting for that perfect opportunity and setting, before popping the question.
She is patiently waiting for him to propose, hoping that his hazardous job will make him think about her before he takes any action. He, on the other hand, wants to find the perfect time and place to pop the question.