Lemme expand on my previous statement. The lack of something being the opposite of that thing can extend to other things, even some non-tangible things. For example, I believe that the opposite of love is not hate. The opposite of love is indifference. You can and probably do hate and love certain things at the same time. When you love something, it’s almost easier to hate it at times. Both passionate feelings that might have whatever they’re directed towards on your mind all the time.
Indifference on the other hand is the opposite end of the spectrum. It is impossible to be indifferent to something and love it or hate it at the same time. Indifference is the complete lack of emotion towards something, so it would be the opposite of love and hate, arguably the most and strongest emotions you could feel.