Who said it does? Love is a feeling created by the mind. An emotion from your soul. Love is the one emotion than can be expressed in trillions of ways. For family, for friends, for romance, for your life, religion, abilities and personality. Perhaps the reason we think love comes from the heart is because the heart is something that keeps you alive. It's always working, giving you life and reason to live. Just like love. No one can live without it, and even those who don't either wish they knew love or wish they didn't know life in the first place.
Live life. Love every day. Let your heart illuminate.