I need hel[!!!!?

well, theres this guy and hes a major player. and i went out with him prob about 10 times this whole school year. he kept on breaking up with me and playing with my head. He went behind my back and did stuff with other girls. He told my best friend tht he liked her and that he was only going out with me till he found another girl so i broke up with him. But i really really love this kid. Like no other. And Hes hurt me so many times and i still love him. Its been about a week since i broke up with him and we havnt talked since. I refuse to talk to him. But when i start missing him and thinking bout what he did to me it makes me not wanna talk to him anymore. And now all of a sudden he sits at a table in front of my table at lunch and flirts with my best friend right in front of me. I really hope he knows that he will regret tht he ever let me walk away. But i want him to realize that im never coming back. But how can i show that. How can i make him realize what he did. i need help