Boy troubles...Help please

Well this 9Th grader likes me....well he keeps saying he 'loves' me! But a NINTH grade boy loving someone...yeah right. Plus he barely knows me!!! I mean we go to church together that's it! I don't know what to do I keep telling him you don't mean that and he is like ' I love you with all my heart!' Yea and I saw a unicorn yesterday, lol. I am just tired of him txting me and calling me. Ugh! He needs to realize I don't like him!!! Period the end. Does anyone have any advice on how to make him stop? Like something I can tell him?