What should i do about this guy?

this guy and i were perfect for each other. we would yearn for that moment in our days to see each other. he then quit calling me and texxting me i cant get him off my mind, i still see him around i want him back. its weird how he slowly drifted away its been 2 months, i cant get over him... no matter what i do or how busy i amm or what im doing i cant... do you think that he still thinks of me or he is completely gone?? im seeing him tomorrow at a club meeting. what should i do to make him want me back?