Formal:
* Ame-o: This is the most formal way to say "love him" and is used when addressing someone with respect or in a professional setting.
* Queira-o bem: This translates to "love him well" and is a more formal way to express affection.
Informal:
* Ama-o: This is the informal way to say "love him" and is used with friends, family, or people you are close to.
* Adora-o: This translates to "adore him" and is a more intense way to express love.
Other options:
* Ele é o meu amor: This means "He is my love" and is a very romantic way to say "love him."
* Eu o amo muito: This translates to "I love him very much" and is a good way to express a strong feeling of love.
The best way to say "love him" in Portuguese will depend on the specific situation and the relationship between the speaker and the person being talked about.