When a girl does this what does it mean?

tuesday in class I looked up I saw the girl i liked looking at me & smiling then she looked down at my chest while still smiling. then she looked up at my face while still smiling so I just looked away. then when I was talking to one of my friend I couldn't really hear him cause I had my headphones on & he said justin did you hear what I said & i said no. Then I heard her saying to her friends that I crack her up and said that I was quiet but funny.

I think she likes you. She's signaling that.