Formal:
* É amado/amada por mim: This is the most literal translation and is suitable for formal situations.
* É-me querido/querida: This translates to "is dear to me" and conveys a more affectionate sentiment.
Informal:
* Você é amado/amada por mim: This is a more casual way to say it, using the informal "você" for "you".
* Eu te amo: This is the most common way to say "I love you" in Portuguese and is appropriate for close relationships.
Note: In Portuguese, the verb "to love" (amar) is conjugated differently for masculine and feminine subjects.
* "Amado" is used for masculine subjects.
* "Amada" is used for feminine subjects.
So, the best way to say "are loved by me" in Portuguese depends on the context and your relationship with the person you are speaking to.