Flirting

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

I'm a Freshman in College, and I'm friends with a guy who I have a small crush on. Whenever I'm cold, he'll immediatly offer me a sweatshirt of his, like right after I say it. And last night, I was in my friends room, and I was lying on the floor when the guy walked in with a blanket around him. We were all talking, and then I said I was cold. I didn't really expect anyone to do anything, but the guy did, he gave me his blanket, which I thought was sweet (he was clearly cold because he was wearing is when he walked in, and he still gave it to me). I haven't really seen him giving any other girls his sweatshirts, or anything else for that matter either. Could this mean that he might be interested in me, or that he is just a nice guy? I don't want to overthink this if it doesn't mean anything.
What does it mean when a guy gives you his sweatshirt?
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