In Japan, there are 3 ways to say ”I Love You”:
Daisuki - for friends and persons you like.
Aishiteru - for a more serious relationship.
Koishiteru - for the person you want to spend the rest of your life with.
They’re amazing ‘cause they made this rule to preserve the REAL MEANING of saying ”I Love You” and not to LOSE IT like MOST OF US DO.