The body for sure has a hormonial and chemical reaction when in love. If the feeling has their own soul and their own being is debatable. If it's real - yes very much so.
There are different ways to express love. It's called "love languages" in some theories.
Words of affirmation
Acts of service, and physical touch
Give time, and gifts
You can of course do all of them, but often you priorities or value one over the other. Time, affirmation and gifts are important to me and I have to remind myself that depending on the givers prorities receiving a service could mean more eventhough I'd rather spend the time with them.
You quiz lovers can check this out: What is your love language?
Also q and a about love: Why do fall in love?