What are signs that a guy is being protective?

Anonymous
By protective I don't mean a jealous boyfriend who threatens to beat up a guy who so much as looks at his girlfriend.

I have this feeling that this guy that I know and am kind of acquaintances with is into me and he seems to be protective of me...

There are several things, some examples would be: he paid for my food when my credit card wasn't working, he has lead me by putting his hand on the small of my back, when I saw him over my break at work I went over without a coat in freezing weather (my manager keeps his office where my coat was locked and gets p*ssy any time anyone wants in) and he was concerned and asked if I was cold (however he was working and his boss and customers were there, so its not like he could warm me up... I think he would be too shy for that anyway), he is always quick to help me when I see him at work (quicker than he is with other customers), etc etc.

But less about him and more about... how do guys act? Guys - if you feel protective, what types of things do you do? Do you ever feel protective of girls who you just like who aren't your girlfriend?
What are signs that a guy is being protective?
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