Generosity is not sacrifice. What you give counts as being generous even if your gift was small. It counts even if what you gave was expected. It counts as generous even if what you gave also brought you joy.
Gifts can be time, attention, energy, or physical objects.
Humans are designed in a beautiful way where giving brings joy to the giver AND the receiver. Feeling into every bit of joy that you get from giving in no way diminishes the gift.