You've changed
I've changed and you don't live up to my newly skewed standards.
- Wanna hang out like old Times?
- You've changed.
- WTF?!
- You've changed.
- WTF?!
You've changed
To be used half jokingly amongst friends; use when an acquiantance does or says something out of the ordinary.
Your wingman suddenly decides that he would rather sit home and watch a movie than head out to the bars on Saturday night. "Billy, you've changed"
You've Changed
To act in a situation where you have never been seen like.
-Tom just tried to drown that girl in the lake.
-I have never seen him like this.
- You've changed
-I have never seen him like this.
- You've changed