The narrator feels different emotions when it comes to the "woman in the wallpaper" that she believes she sees. "The woman in the wallpaper" is also symbolic of the narrator's own mental state at times.
First, the narrator is very curious about the woman she believes she sees in the wallpaper. She begins to observe the wallpaper more and more once she begins "seeing" this "woman." It is apparent, at this point, that she is beginning to have a serious mental breakdown. Her mental state only gets worse, unfortunately.
She also gets rather upset and angry about the woman in the wallpaper. She wants to understand who and what she is and why she is there. She desperately wants to uncover her, which is why she begins tearing away the wallpaper until it becomes a complete obsession for her (the narrator). The "woman in the wallpaper" slowly begins to become more animated in the narrator's mind:
She discovers that the woman in the wallpaper shakes the bars of the front pattern as she tries, unsuccessfully, to climb through them.(eNotes)
As the narrator's mental state diminishes, she starts to become the "woman in the wallpaper." She thinks about committing suicide, but does not do so and instead crawls around the baseboards of the room, carefully crawling over her husband who has come in and who has fainted at the sight of her. (eNotes)