I’m sure that’s when I know I’m really in love...

You know how some people say after a few years how a couple would begin to hate each other by anticipating their reactions or getting tired of their mannerisms; 
I think it would be the opposite for me. 
I think I can really fall in love when 
I know everything about someone...

The way he’s going to part his hair, which shirt he’s going to wear that day, knowing the exact story he’d tell in a given situation. I’m sure that’s when I know I’m really in love