English is kind of weak in this arena because we only have one word for love, but we can modify it to be more useful: romantic love and fraternal love. Any other use stems from these two, and will basically boil down to "I like ___a lot."
Another specification is when people ask "Do you love them, or are you in love with them?"
"In love" means romantic love, I think. You want to spend your life with this person, probably every day, will overlook their faults and are enamored with the things they do, the way their brain works, etc.
Yeah, this. It's an amazingly well-written novel... seriously, one of the greats. But I would absolutely never describe it as a love story. That definitely requires some amount of reciprocation and not just grooming and rape.