Sternberg's triangle of love
In 1986, psychologist Robert Sternberg proposed that love has three components: intimacy (closeness and trust), passion (attraction and desire) and commitment (the decision to maintain the relationship). Combining them gives different types of love, from friendship to infatuation.
The ideal he called consummate love has all three in balance. Look at your bars: the pillar that's lowest is often the one worth caring for.