After all the butterflies are gone and you have to deal with uncomfortable real life circumstances that hurt, love is the person that is still there holding your hand. They don't intentionally hurt you. They don't lie to you. They honor you whether you're in front of them or not. And hopefully they like sex. A lot. That's a huge plus
Patience, communication, loyalty, trust, commitment, honesty, understanding, compromise and forgiveness.
Accepting the person for who they really are, flaws, quirks and everything...