How can you tell if a 10 year old girl likes a 11 year old boy?

you can tell that a 10 year old girl likes a 11 year old boy by the way she may try to avoid contact with him, but is always staring at him. if that 11 year old boy is already going out with someone, then the 10 year old girl may try to get info about the relationship by asking the 11 year old boys' girlfriend.