‘Is love an invention created by humans?’

No because love is a ‘strong feeling of affection’, therefore love is a feeling and emotion which is a natural thing for humans to do. Saying love is an invention is just like calling the following inventions too; sadness, anger, hatred, happiness, etc. Most of the time we can’t help what we feel towards others/things and that is what makes us different. Love can be a natural instinct too demonstrated by animals, the offspring are normally guarded and protected by the parents. An invention is something that is created by someone or something that is unique. Love could potentially be an invention but even so it would not be by humans, as humans were not the first living things on the planet.