About Me! Gumy Eucalyp Tus!

The little houses that surround me,
When my friend visit some of them fall.
My hair falls down like rain drizzling down,
But more and more then grows.
I can live for many years,
And I’m a home to many.
My best friend is called Sunny,
I like to live in dry places,
But I’m also okay in damp places.
Some like to eat my hair,
Some like to use my oils.
I have a nice calming scent,
And I can grow as tall as 55m!
I can also grow flowers,
And I was born in Australia.
Who am I?