Exaclty, they are separate stripes... You can't have white and black as one just like you can't have apathy and love as one... But you can have love and hate as one, so they obviously aren't opposites.
So what's your logic here? You can make a coat that has different stripes saying Love and Indifference, does that mean that you can have indifference towards someone and love them? No, because then you clearly aren't being indifferent. Wether you paint something on a coat or not has nothing to do with anything but fashion.
And if numbers are labels for emotions as put forth by the original poster, then one assumes zero is the equivalent of zero emotion aka indifference. Why do you think we invented the number 0? To be able to represent; as an answer, nothing, nought, a zero sum. So I said Zero as the representation of apathy and also as the embodiment of nothing. You can't have 1 and -1 simultaneously, it comes to zero. Which as I just said in this analogy zero would be apathy, but in reality you can love and hate someone and it doesn't equate to nothing and it certainly doesnt equate to indifference, which is why this is a terrible analogy.
Exactly Love is an emotion, so whats the opposite of an emotion? Apathy, indifference, no emotion.
Whats the opposite of a shape? No shape.
Whats the opposite to a cloud? No cloud.