My only friend

Inspired by Chritina Irakleous's post: My Best Friend 

We have seen multiple examples of robots being friends in movies and shows. Nowadays you can even get AI driven toys to be your best friend. But the question I ask myself is whether dependencies on such friendships are good for you. What happens when the robot stops working or decides to not be your friend anymore? Would you let go of that friendship, or get a new robot or even go as far as to reset the robot to start over? Can having the power of when to communicate and start over really be a true friendship?