that is sad. in my humble opinion, this definition falls short and is probably more like the answer to "what is lust?" or "what is attraction?". it can occur entirely in the brain without any meaningful action to back it up; or can even have malevolent action that follows. For example, I imagine a rapist or child molester or teenage boy looking at porn could have "a bunch of neurons firing at once, a flood of chemicals thru your body and a fever"; but I would not define their outcome behavior as "love".
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.