Hey tgm,
Erm, not sure I follow!
The old clothes at the house you both used to live in or his ex?
I am assuming it's his ex or why else would you be bothered, why are you bothered?
He is with you, try and concentrate on that, not easy I know.
I still have stuff of my ex's, including a key, which I paid for and I was not going to give it back unless he paid for it! Pathetic I know but that's how it gets sometimes, we only split just over a week ago for the millionth time!
If he's not bothered, then don't let it worry you.
Rambling again..
BB xx