Informal:
* Love: This is the most common way to express love in Australia, just like in English.
* Mate: This can be used to express affection for a close friend, particularly male, and is often used as a term of endearment.
* Strewth, I'm so keen on you! This is a more enthusiastic way to express love or strong affection, using typical Aussie slang.
* You're alright, mate. This is a playful way to express fondness or approval, often used among friends.
* She's a ripper! This is a way to express admiration for someone, often used for someone attractive or impressive.
* You're a legend! This is a way to show respect and admiration, often used for someone who has done something great.
Formal:
* Love: This is also used formally, just like in English.
* Darling: This is a common term of endearment for a partner or loved one.
Other options:
* I'm smitten with you.
* I'm crazy about you.
* You're my best mate.
The best way to express love in Australia will depend on the specific relationship and the situation. It's always a good idea to be mindful of the tone and context when expressing your feelings!