Gu Xijiu was easily susceptible to irrational behavior when she was angry. She sat there to calm down. After some time, she had finally calmed down enough to think rationally.
It was an undeniable fact that Di Fuyi loved her very much. When she was stabbed by 'Ye Hongfeng' and her soul was separated from her body, the body had attained a spiritual power of level eight which had already met Di Fuyi's requirement.
After that, she was trapped in Long Fan's underground palace. If Di Fuyi did not love her, he would not have risked his life to come and save her. It was indeed a life-threatening situation, and it was not something that could be acted out.