Love is the word used to describe and/or explain how we feel about others. It probably has a number of biological characteristics that we may be able to observe or measure. I think some may include a general type of brain activity when thinking of a loved one, hormonal responses to interactions with that person, and other things. I believe one day we could predict whether two people love each other based on raw data without watching them in real life.

Reminds me of a movie I watched several years ago (a scifi Romcom

) .....about a digital timer implant worn on the wrist that counts down to the exact second Destiny introduces a person to their to their soul mate .