Check this out:
There is nothing in between love and lust.
Try to substitute those nouns with comparable ones and you'll see what I mean. "Hatred, head colds, and everything in between." "Optimism, diverticulitis, and everything in between." It's ludicrous.
Admittedly, it is possible to confuse lust with love—just as it's possible to think that the world is against you when you really just forgot to have your first cup of coffee.