Upside: Homebody and home beautifier; enjoy entertaining; wide circle of friends and family; driven by relationships. Downside: A thinker and a feeler; passive aggressive tendencies; high drama.
As two cardinal signs, Cancer and Libra go after what they want in very different ways. Cancer feels out new people emotionally, and may not sense a safe harbor with airy Libra. The vivacious and/or charming Libra comes alive with an admirer. But keep in mind, the Moonchild is aloof at first, and very emotionally self-protective. The first few dates could be awkward, but with other harmonies in the chart, you'll find some love chemistry.
Libra's initial modus operandi is to be talkative and observing, and Cancer may find this too risky. The Moonchild might feel they're being pressed to share more than is comfortable.
Libra finds Cancer a muddled thinker, too tossed about by their emotions. Libra thrives with a lively give and take in conversation. But something can be missing for the Crab -- the Libra sense of detachment raises alarms, because Cancer can't sense the feeling currents there. But Libra's detachment, in loving hands, can be a great gift for subjective Cancer. Both have much to offer the other, if trust can be built to overcome basic differences here.
But both sense someone substantial, and perhaps the real thing. Libra seeks partnership, and Cancer aims to create a secure home -- if there's timing, a commitment between them ensues.
What bonds them is a shared desire for a harmonious home life. Libra's fixation on the relationship eases the insecurities of the Crab. This is an affectionate pair, focused on fulfilling the needs of the other.
They both shy away from conflict, and this could lead to repressed anger with the potential to be destructive. It's key here to trust each other enough to be truthful, even if it temporarily upturns the apple cart. The other issue is socializing -- Libra may want to hit the town, while Cancer is happiest at home or with a few close friends. But Cancer and Libra don't mind making compromises that enhance the relationship, and this ups the chances for an enduring life together.
Also see I'm a Libra in Love with a Cancer -- suggestions from the Libra's corner.