A flip of the usual
Usually the Moon is where the feelings are and the Sun is where the thinking is. You’ve got it the other way round. Your Sun lives in the most emotional water sign, while your Moon, your instinctive side, is cool, balanced and watchful. That often makes you a keen observer of people, almost a bystander watching your own life from the balcony. You tend to see what people are good at and where they fall short, and you may understand human behavior better than most.
You can be fairly private in public, too. People might find you charming and leave without having learned much about you.
Relief, and its cost
Your Moon is a real gift on rough days, because it gives you some relief from Cancer’s emotional waves. You can be fair even when you’re hurt. You also tend to care a great deal about being in a good relationship, and you’d rather talk things through than have a scene.
The cost is a lag. You might explain a situation calmly for weeks, and only much later find out how much it hurt. A partner may feel you’ve got a whole other life going on in there, one that they’re never invited into. Since you hate unpleasantness, you might also agree to things your Sun cannot live with.
Coming down from the balcony
You don’t need to be fair at every moment. In a close relationship, try saying what you feel first, and give the balanced view later. “I’m angry” is allowed, and it can stand alone for a little while. And use that gift of observation on yourself, gently, by asking what you’ve been very reasonable about lately. It’s often a good clue to what’s actually bothering you, and to what’s worth bringing up.