Love is like a myth
It is not entirely correct to use the concept of "love" in a biological context, since very often this concept is understood as attraction, arousal, instincts, attachment, and similar terms. The strange combination of love and genetics is easily refuted by scientific observations. Charles Darwin (the author of the theory of evolution) writes about sexual selection as the reproduction of better and more competitive offspring. The theory of Vigen Geodakian (the evolutionary theory of sex) considers sexual dimorphism (that is, division into two sexes) as a key component of the development of man as a biological species. This is about biology. In the fundamental existential philosophy of Arthur Schopenhauer, the feelings of two people are subordinated to the goals and objectives of the family, where the main incentive for relations is the continuation of the family in the most beneficial way, that is, the so-called lover acts here only as a link in one chain. In the work of Otto Weininger "Gender and Character" there is an understanding of Platonic love as one of a kind: "I will say more: there is only Platonic love. Everything else that is called love is just disgusting. Thus, from a superficial analysis of theories and concepts, we can conclude that scientists and thinkers did not always designate love as something sublime or conditioned by the work of hormones, moreover, they did not always attach any true meaning to it.
The theory of hormones itself can also be attributed to love as a myth, since it is more about attachment and arousal.

Love in art
Love in art manifests itself in a wide variety of forms from literature (prose and poetry) to painting, and almost always has an individual, subjective character. Love for a woman is equally deified in the poems of Bunin, Yesenin, Blok, Mayakovsky. Painting of the 19th-20th century completely rethinks the understanding of bodily (erotic) love and opens up new facets of understanding this feeling. In this case, love is a skillfully woven image of the relationship between man and man.

Three years is not the end, but a crisis!
Indeed, in psychological science there are crises of relationships (not love!), where the first domestic and emotional experiences can be attributed approximately to this age of relationships, to three years. Also, psychologists often write about crises of one year and seven years, which is comparable to the actual age-related crises of a child (a crisis of three and seven years). In this case, if there is a crisis in the relationship, it is impossible to talk about their end. Here it would be more appropriate to say about closer work on relationships in the presence of crisis or conflict situations.


Myth or truth?
Of course, the fact that love lives for three years is a myth, since repulsion from one theory (not recognized by the entire scientific community!), Is only a special case of the perception of relationships. It is worth noting that any, I emphasize, any relationship is unique, as it has its own history and prerequisites, including the life stories of both people. Relationships as such, actual or based on marriage, are a rather complicated thing for scientific research, since the analysis of such must be lengthy and individually objective.
Love does not live for three years, because it is the result of the painstaking work of two people interested in each other. Another thing is that relationships can not always be based on love, since two people in a couple can invest completely different things in this concept. In this regard, love remains a mystical concept that is not related to productive relationships. Since the key to a long, promising and, in part, based on love relationships is the attention, care, experience and mutual interests of two people who are not indifferent to each other.