Difficult, perhaps it is still a complex chemical process. We fall in love with the brain, not the heart, although the heart also participates in this, but again because of the brain. If, in very general terms, it all comes down to the production of certain hormones, let's call it the hormone of happiness (if in more detail oxytocin lowers the level of anxiety, phenylamine increases sympathy, vasopressin is responsible for attachment, serotonin is a feeling of elevated mood, dopamine is pleasure) as a result, a person becomes less critical , more cheerful and trusting. Taken together, falling in love can be compared to drugs, when we lose a loved one or break up, the level of hormones falls, a person can become depressed. This can be compared to some kind of brittleness, maybe) something like this.
The question will be answered ...
Professor Sergey Vyacheslavovich Savelyev. (born 1959) - Russian scientist, evolutionist, paleoneurologist, doctor of biological sciences, professor, head of the laboratory for the development of the nervous system at the Institute of Human Morphology, Russian Academy of Medical Sciences. Photographer, member of the Creative Union of Artists of Russia, awarded with bronze, silver and gold medals of the TSH of Russia.
Interested in the mechanism of action.