I hesitate to ask what Love is, but maybe it’s not such a bad idea, at least to see if we’re discussing (are we?) the same thing.
For me, Love is the emotion that mirrors the welfare of the loved one. When my loved one is sad, that saddens me. When my loved one is happy, that makes me happy. To me, that is Love.
I see two components to Love: passion and harmony. The popular conception of Love focuses on passion, as in “oh baby, I looooooove you!” This focus leads to the tragic phenomenon of domestic violence, or more flippantly as “you always hurt the one you love.” Tragically, it’s not uncommon. That’s because there’s often not enough focus on the harmony part, and I mean harmony with the other, not with the feelings within.
Some people say the opposite of Love is hate. Others say it is indifference. I say it depends on whether the focus is on harmony or passion. In the plane of passion, the opposite of Love is indiffernce. In the plane of harmony, the opposite of Love is hate. So I think I’ve identified the right elements.
Another way to see Love is as an experience. Seen that way, Love’s opposite is fear.