I am happier when I love than when I am loved. I adore my husband, my son, my grandchildren, my mother, my dog, and frankly, I don't know if they even like me. But who cares? Loving them is my joy.

This quote means that the speaker gets more joy and happiness from loving other people, even if they don’t necessarily love them in return. The speaker mentions specifically their family members, spouse and dog that they love, even if they are not sure whether those people return their love or not. In other words, the speaker finds more joy from giving love, rather than receiving it.