I thought we were friends
A line used when someone is being a total a**hole and you're too stunned to react. It sounds like a question, but it's really a loaded f***ing grenade.
I thought we were friends. Why did you steal my snack? I was f***ing hungry.
I thought we were friends. You said you'd never betray me. Now you're with my ex.
I thought we were friends. You just took my last soda. I'm gonna die.