What does it mean when a guy gives you his jacket?

boss_lady
We were walking and talking together. He is one of my guy friends. He tried to give me his jacket but I told him no thanks. He said that I looked cold but I told him that I wasn't. ( This is Florida and almost spring time). He basically forced me to take it so I ended up taking it. I wore it all the next day and when I tried to return it to him but he told me to keep it. It's been almost a week since I had it now.
What does it mean when a guy gives you his jacket?
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