Found these two ideas.
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Claddagh – Hand symbolizes friendship, heart symbolizes love, crown symbolizes loyalty.
Robert Sternberg's Triangular Theory of Love
Go to the website, even if just to see the chart.
Felt like sharing. And, just for the heck of it,
love [luhv] noun, verb, loved, lov·ing.
–noun
1. a profoundly tender, passionate affection for another person.
2. a feeling of warm personal attachment or deep affection, as for a parent, child, or friend.
3. sexual passion or desire.
a person toward whom love is felt; beloved person; sweetheart.
5. (used in direct address as a term of endearm