The same chemical process that takes place with addiction takes place when you fall in Love. Addiction is a facet of Love.
Not all Love is addiction, but all addiction stems from Love. Love is a chemical state of mind that is part of your genes and influenced by your childhood upbringing
You are looking to find your soulmate; the selection process is mostly made in the limbic brain (the unconscious part of your mind).
You use vision, hearing, smell, and probably some other unconscious senses that you might not be aware of to select your partner.
It is during this phase that you base your decisions on a preconceived (and perhaps irrational) notion of who your soulmate should be.
Butterflies in the stomach, dizzy excitement, and an awkward nervousness are common indicators and signs that you are developing feelings for someone.
These reactions simply come down to the release of the four chemicals in the brain.
Adrenaline, norepinephrine, dopamine, and serotonin. All of these organic chemicals work together to give you that much desired Love experience, but their effect is not permanent.
The brain chemicals responsible for falling in Love return to their baseline level of functioning about two years after it begins. At that time, you lose the illusions, delusions, and euphoria of falling in Love.
This is not the end of Love as some people believe. It is the phase between romance chemicals decreasing, and the beginning of the true Love phase that is based on another set of brain chemicals.
There is a clear difference between Love and romance and the two can exist together. New brain chemicals blossom; nonapeptides, which cause a strong bond with only one partner.
These chemicals promote trust, calmness, and a harmonious relationship. Nonapeptides cause you to forget the pain of falling out of Love, or never even recall that it happened.