Most Helpful Guy
I wouldn't ordinarily tell a girl this, but it almost definitely means that there is interest of some kind. If a guy goes out of his way to let you know that he feels at ease around you, enjoys your company, etc. it's usually a way of saying that he likes you. Of course it depends on a guy, but compliments like this usually aren't given to someone if it's just a friendly relationship.
I am, however, a bit confused by the word 'approachable' and I might need some more context. If he says it in a way like, "you are very caring" or "you make people around you feel good" that's good. It is an unusual thing to say to a girl though...1