What does aloha kaua mean?

I have a native Hawaiian friend who defines aloha kaua in this way: "Aloha kaua - is sharing love between you and I. Aloha maua - is sharing love between all of us."

I'm a student from Hawaii taking a Hawaiian language class and this is my answer:

"Aloha kāua" is a formal greeting used by one person to another that you would use at the beginning of a letter or greeting your teacher in the morning etc.