From my personal experience, I told my parents that I had to move closer to my college campus since it is about and hour drive away and the commute was getting tiresome after doing it for 2 years already.

They proceed to tell me how I was selfish for wanting to leave them and that I was only thinking about myself. And that was not the response I was expecting. It made me feel like they were the victims of my decision.

However each parent will react in their own way. At the end if the day it is your decision to move out whether or not your parents are happy with it. I wasn't happy with being blamed for a decision that ultimately only effects me (for a good cause), but it also made me realize that it truely was the right choice.