I love love you
If you say 'I love love you,' you're basically saying you'd fight a dragon for this person. They're not just a friend. They're your future wife or husband, or your future ex who you'll hate in 5 years.
'I love love you', said to my crush after he asked me out, then he broke up with me for a girl who had a cat.
'I love love you', said to my little brother after he stole my lunch money again.
'I love love you', said to my best friend after she forgot my birthday, and my mom.