Does reality change, or does our perception of reality change?

I was recently discussing this with a dear friend of mine the other day.  I told her that I believe that our reality changes as quickly as I stroke these keys.  From one moment to the next our reality is constantly changing. 

My girlfriend (lets call her Jasmine) stated that reality doesn't change....our perceptions do. 

HUH??  At first I thought...'Ok, you just signed up for a debate, honey. This is gonna be easy.'
That was my ego t...