You are sensitive and caring by nature, although you present a tough exterior to the world. You soon learn ways to protect your feelings, which run very deep and tender. As a lover you seek security and fidelity, and, although you are not above a few flirtatious peccadillos of your own, you can be deeply wounded if the one you care for betrays your trust (which is never given lightly). Cancer is poetic and romantic, but also practical in matters to do with the home and raising a family.
A good communicator, your deep sensitivity can present you with valuable and illuminating intuitions, especially regarding those you care for. This said, sensitive Cancerians under pressure can retreat within themselves and allow repressed emotions to bottle up until they either explode with devastating force, or implode catastrophically, causing general meltdown.
Cancer, a feminine (yin) sign, is ruled by the Moon. So in relationship, Cancer, the most nurturesome sign of the zodiac, seeks a secure nest, or bolthole. The fluctuating Moon can reflect a moodiness in your nature that is not always understood nor appreciated by others.
Cancerians can be difficult to understand and sometimes allow irrational emotions to rule their otherwise sensible heads. For this reason the Cancerian soul seeks to build strong walls around home and loved ones, so tender feelings may express themselves in an environment which is stable and secure.
Cancer is a cardinal sign, so you are best involved with someone who understands creativity and will accept you for what you are, moods and all. Because your emotions are so powerful, you seek a partner who is stable and responsive, while at the same time understanding your intermittent need for solitude, alternating with a gregarious desire for companionship and stimulation.
Cancer is protective, even possessive and can be a jealous lover, though more from insecurity than simple desire to dominate. Those who seek a loving, protective partner, who has wonderful bouts of creativity interspersed with dreamy romanticism, yet peppered with practicality need look no further than Cancer.