Close to Being Human?

In class last week we watched the Black Mirror episode called Be Right Back. In this episode, a young woman's husband lost his life in a car accident. She then was introduce to a program where she could "talk" to her dead husband through text and phone calls. This could be accomplished by downloading the app and uploading videos, pictures, and any other social media to the app.
After only a few days, the young lady decides to take her purchase up to the next stage, which was recreating her husband as a robot. This at first seemed to be a great idea because she was depressed and needed someone's affection, but it soon took a whole 360. She began to tell the robot that he wasn't enough; that it wasn't the same as her husband. It looked like him, talked like him, but didn't have the memories or life experiences the husband had.
This raises a question, what does it mean to be human? Is it just having life experiences and having those memories in tact. Because if so, like the robot in the show, it seemed pretty close to that. It was only lacking the memories and life experiences. If the robot had been made to just live it's own life, then maybe it would have been able to develop it's own personality and maybe even feelings towards certain things.