When Ramana says you are the True Happiness, he speaks as the True Happiness within you, not as a separate one. When he says you are the Self, he speaks as your own Self, not as a separate person who has experienced it.
For him the Self is one. When he says you are the self, he speaks from within all, as the Self. …the pointing is just one, and it’s speaking towards the one, and that is within you. That Self is saying you are the Self, not a person. That True Happiness is saying you are the happiness, not a person.