when you see him act as if you aren;t all that bothered, act like you would toward a friend, don't make the effort to talk to him as soon as he arrives wait a while (if with your friends), to show you have got over him, then you will be able to tell if he gets abit annoyed or confused then you can tell if he still likes you!!, honestly it is the only thing you can do if you don't want to talk to him about it, don;t hide from him or ignore him or he may think you are bitter toward him, and you never know he might even go up to you and talk to you first.
be strong and don't let yourself get upset!!
girlpower and all that lol