Why I don’t let others drive my race car

I worked with a "friend" doing construction work. I left my framing square in his car for about 6 months and I saw him and said "can I get my square out of your car..." he said "That's not your square I don't know here your square is..." I said "neverminded keep it..." it was like I left it past the expiration date where I could get it back. people are strange, always been...