Spoiler
"you've changed" or "you used to be so-and-so" seems a lot to me like what you're really saying is,"i don't like what you grew into, so everything you are and feel now is fake."
"i didn't care enough to get to know you well the first time around, but you're not allowed to turn out to be something i don't like."
"if this is the 'real' you, you should really go back to faking it."
"i liked you better before you started paying attention."
"i liked you better when you did what i said."
"i liked you better before you learned right from wrong."
"i liked you better before you figured out you can walk away."
"i liked you better when you were too messed up inside to tell me when you needed help."
"i liked you better when you were too thick in denial to remember when i'd wronged you."
"i liked you better when you didn't act like a real person with needs and emotions."
"i didn't care enough to get to know you well the first time around, but you're not allowed to turn out to be something i don't like."
"if this is the 'real' you, you should really go back to faking it."
"i liked you better before you started paying attention."
"i liked you better when you did what i said."
"i liked you better before you learned right from wrong."
"i liked you better before you figured out you can walk away."
"i liked you better when you were too messed up inside to tell me when you needed help."
"i liked you better when you were too thick in denial to remember when i'd wronged you."
"i liked you better when you didn't act like a real person with needs and emotions."