Using a single word:
* Bonito/Bonita: This means "pretty" or "beautiful" and can be used to describe something you love.
* Lindo/Linda: This also means "pretty" or "beautiful" and is often used in a more romantic context.
Using a phrase:
* Amar muito: This translates to "to love very much" and conveys a strong affection for something.
* Gostar muito: This translates to "to like very much" and is a less intense way to say "love pretty."
* Achar muito bonito/bonita: This means "to find very pretty" and emphasizes the aesthetic appreciation for something.
Example:
* "Eu amo muito essa flor. Ela é tão bonita!" (I love this flower very much. It's so pretty!)
The best way to say "love pretty" in Portuguese depends on the specific context and the intensity of your feelings.