Bombadil leather belt

Like a leather belt I am unlatched on the floor
The untethered ball detached from the core
Please don’t pick me up perhaps it’s my preferred form
Please don’t put me back I’m a dropped acorn
If you mean well, leave me here
Don’t leave me here
It’s what I fear
As a desert oak I wear a trench coat of thorns
If you lean on me your skin might get torn
Just a heavy wind I am a hurricane being
A steady wave cursing all I’m seeing