Formal:
* Aloha ʻoe pū kekahi. (This literally translates to "Love you also.")
Informal:
* Aloha wale nō ʻoe. (This means "Love you only.")
* Mahalo nui loa no ke aloha. (This translates to "Thank you very much for the love.")
Romantic:
* Aloha ʻoe, e ke aloha. (This means "Love you, my love.")
You can choose the option that best fits the situation and the relationship you have with the person.