I don't know how to catch his eye. i don't get him.?

I KNOW EXACTLY HOW YOU FEEL. thats happened to me before. you have to tell him how you feel or start talking to him. even if he ignores you act like you dont care and walk off. show him that your confident and that his ignoring you doesnt bother you because then hell think like oh, maybe i should stop doing that then its not doing anything for me