Does he not like me anymore :(?

me and this boy from another state met because he was visiting my cousin for one day. we hit it off and he was like "so tell me about yourself" and was really sweet. then he added me on facebook and asked for my number and was flirting BIG TIME. (telling me how pretty i was, that he wanted to be with me, that if he could go anywhere in the world it would be where i was, that he liked me a lot), all in all it seemed like we were going to have a long distance relationship. then he started acting sad over text and i told him i missed him. he said "i miss myself too." i asked why and he said "because the last time i saw myself was when i was with you." then he never talked to me again until one day a month later i texted him. he talked for awhile then said "brb" and never texted me back. i give up. please help? what happened, i still like him a lot... :(