I have no idea what to think

I don’t know how guys act when they like a girl. There’s this guy now and we aren’t really friends like we talk occasionally and have banter , but I have noticed that every time we talk he always makes some effort to like touch me in some way( not creepy ). Like even the other day i wasn’t even in a conversation with him at all he just walked by me and ran his hand across my back.Maybe he just wants to be friends with me and that’s why he’s getting my attention or he’s just like that.