My crush raised his eyebrows?

What does it mean when a guy raises his eyebrows? Someone who thinks you might like him, too (like, he might know I like him). He did this before and I found out later because he asked me if I liked him. I didn't answer his question really. But he did it again with the eyebrows what does it mean? It happened because I looked at him and he saw me and I smiled, he smiled back. I looked away and looked back he was still looking at me and smiling and I smiled and then he raised his eyebrows. Help?
My crush raised his eyebrows?
Post Opinion