A few tips:

Instead of holding your stick out to the side or straight in front of you try keeping it somewhere in between there (think a 45 degree angle), and move it from side to side. Also try holding your top hand closer to your body.

If you are holding your stick straight out in front of you or straight to the side then he knows how far he has to go around you. If you disguise how much reach you have you should be able to get him with a well timed poke check as he tries to go around. Same thing with holding the stick closer, gives him an illusion of shorter distance.

I usually do both of these with only my top hand on the stick and my bottom hand free. Keep looking at the chest/hips. Eyes can be deceiving, as can the puck and hands. The core is going to tell you where he is going, also good spacing is key. Close enough that you can step up if he goes to shoot and far enough back he can't just blow by you.

Keep playing the body, you don't have to hit him, just tie him up so he can't make a move or take a shot. If he complains about it tell him to suck it up, this is hockey not figure skating.