What does this mean, i know it's a small thing but could it mean ANYTHING?

okay so i like this guy and we were both at a party, and a friend and i went downstairs to get a drink. I came back up stairs and he said, as i sat down next to him, "you forgot my drink" making a pouty face. So i handed my cup of water to him, and we both took turns just drinking out of it till it was gone. then i was like wanna get me some more? and he did, then my other friend asked him to get her water too and he was like umm no. i know it's nothing but could it mean something that he would even share a drink with me?