In Australia, there is no need to provide any reasons for divorce other than that the relationship has broken down irretrievably.
You can apply to the Family Court of Western Australia for a divorce if you have been separated for more than 12 months.
Even if you still live under the same roof you can obtain a divorce provided you can provide evidence that you separated for more than 12 months.
What about the children?
The Court needs to be satisfied that arrangements are in place for the care of before a divorce will be granted.
What about property?
If you wish to apply to the Family Court of Western Australia for orders as to how your property will be divided, then your application must be made within 12 months of your divorce becoming final.