Love is a deep and irrational regard for another living creature, a regard that you can not justify but, at the same time, can not reason away.
It is the desire to hogtie a random game warden and bust their knuckles with a ball peen hammer to the tune of SoaD's "Prison Song" because you recently saw a video of Colorado Wildlife Officers hanging raccoons to death over supposed clerical errors by their rehabber.
It is the desire to tell your mom that her mother's day gift is you not reporting her illegal baby sitting service to the IRS after your stepdad killed your dog.
It is the desire to blood-eagle Sarah Palin and dedicate her entire fucking state as a living temple to Woden.
It is the desire to drive to Virginia and gut-punch a neckbeard because he made your girlfriend feel like she wasn't even worth taking out to a Mexican restaurant.
You can tell whether an emotion is love based on whether you will get at least five years of prison if you act on it.
Also, it is rather impossible to demonstrate love solely through actions.