They never say "i love you" to each other. They both don't know why. They just don't.

Maybe because they don't have to say those 3 words to make each other know how much they love each other. Their ways of saying "i love you" ate different than just saying it out loud simply.

Note: Every "sometimes" means a time skip happened so they will age with every "sometimes". So there isn't underage drinking cause when they drink their age will be over 18.

Second note: english isn't my first language so i'm sorry for any grammar or spelling mistakes.