Informal:
* Boypren: A shortened, informal version of "boyfriend".
* Jowa: A popular term used in the Philippines, meaning "partner" or "lover".
* Laban: A term usually used for a significant other, meaning "battle" or "fight". This is a more slangy and playful term.
Formal:
* Kasintahan: This literally translates to "partner", but it's a more formal and respectful term than "jowa".
* Nobyo: This is the direct translation of "boyfriend" and is considered more formal.
Ultimately, the best Filipino word for "boyfriend" depends on the specific situation and the relationship between the speaker and the person they're talking about.