Honestly don't say talk to him because that doesn't work.
He wears my clothes without washing, my pants, my shoes and went up to the point of living to people they are his. That's just being ungrateful and a psychopath.
Please help I can't withstand this situation because each time I want to wear my thing they are never available.
We share the same room too.

Buy stupid-looking clothes. Hide the good ones. Wear his clothes. Where are your parents?

Would you let your Girlfriend wear your clothes? He's your Brudder man. I'm sure this will reach into adulthood with the two of you... Laugh now because it is something you will be dealing with for a lifetime.

I went through the very same thing with my TWO brothers until I left home. It was a good laugh later. Sucks while you are going through it.

Have you spoken to your parents about this? My sister used to do that to me. I got a chest with a lock. There was no getting in. It is disrespectful and rude, it's not funny.