To love or being loved is a great feeling. I am not going to tell you how you do that, but I will give you an overview of the chemistry involved while you are in love. Our emotions and behaviors are controlled, influenced, and measured by certain chemicals commonly known as hormones. Some of the most important chemicals involved in the feeling of love are dopamine, oxytocin, vasopressin, serotonin, phenylethylamine, adrenaline, norepinephrine, testosterone, and estrogen.