[header] How to flirt with a guy with your eyes [title] Meet his eyes briefly. [step] As you're keeping tabs on him out of the corner of your eye, look over at him periodically while he's looking at you and allow your eyes to " brush. " don't maintain eye contact for too long yet. 
Just let your eyes meet for long enough to let him know that you're looking intentionally, and didn't just happen to be scanning the room. [substeps] These first fleeting looks is where the spark of attraction is generated.