Well as said above the narrator found it pointless to get back the "nice things" that belonged to her mother who had died. She was shocked to see the "nice belongings" of her mother lying abruptly in unpleasant surroundings in Mrs. Dorlings house. She realized there is nothing the address could return to her. She knew it could neither return her loved ones nor peace of mind nor the former state of well being. The address that held so much importance to her lost all value as she realized that it could give her nothing but pain. She felt that it was better to forget the address of the uncharitable Mrs. Dorling, which symbolizes a tragic past.

The address given by her mother helped the girl in finding out the house but when she saw the tasteless manner in which her belongings were arranged she wanted to forget the address and leave the house as she could not connect herself with her belongings.

Introduction:
In the story, the narrator wants to forget the address as it represents a painful memory associated with the loss of a loved one. The address serves as a painful reminder of a tragic event that the narrator wishes to move on from.

Reasons for wanting to forget the address:

1. Emotional burden:
The address carries a heavy emotional burden for the narrator. It is a constant reminder of a traumatic event that the narrator has experienced, causing deep emotional pain. This emotional burden hinders the narrator's ability to move forward and find peace.

2. Associative grief:
The address is closely associated with the grief and loss the narrator has experienced. Every time the narrator sees or thinks about the address, it triggers a flood of painful memories, which intensifies the grief and prolongs the healing process. Forgetting the address would provide the opportunity for the narrator to start the healing process and eventually find closure.

3. Psychological distress:
The constant presence of the address in the narrator's mind can cause significant psychological distress. It may lead to anxiety, depression, or even post-traumatic stress disorder. By wanting to forget the address, the narrator seeks relief from the psychological distress associated with the painful memories.

4. Moving on:
Forgetting the address is also an essential step for the narrator to move on with their life. The address represents a past that the narrator wants to leave behind in order to build a brighter future. By letting go of the address and the painful memories it holds, the narrator can focus on personal growth, healing, and creating new positive experiences.

Conclusion:
The narrator's desire to forget the address stems from the emotional burden, associative grief, psychological distress, and the need to move on. It is a way for the narrator to find peace, heal from the past, and focus on the present and future.