Why did he had to reject her?
She is a cute spiritist gal, what's there not to like?
On another hand, Torii reminds me a lot of Yuki of Horimiya. Both struggle a lot with feelings of lack of self-worth and a distorted view of themselves. They put themselves down and judge themselves pretty harshly. Torii's case is worse still because she keep herself away from people and thinks she is a bad person for it. Those kind of thoughts and behaviours are breeding ground for depression.
I just want to tell them that they are good people, and to treat themselves fairly