Most Helpful Girl
I had a group of guy friends, one I was attracted to and had liked but changed my mind and tried to make it work as just friends. One other guy I was attracted to a bit but never let those thoughts develop and was always a genuine friend to him. The other three guys I never viewed any differently than a girl friend. So yes, it's possible for the opposite sexes to be "just friends". Both have to want it though for it to work. It never really worked with that first guy who I was attracted to and once had feelings for.
It sounds like this one guy you're talking about likes you as more than a friend. None of my guy friends did any of that for me and I would have taken it as they liked me if they had. Do you consider him your best friend? Maybe that's something best friends / someone you're emotionally close with would do as it's very caring. My take is he likes you as more than a friend.