Chinese female born 19 Oct 1978 compatible with american male born 4 May 1982?

I like this American guy despite only met him 2 days in person. We started online chatting in August, followed by whatsapp. Before meeting up, we were kinda intimated and liked each other. We met the last two days before he was flying back to Seoul to work. Once he got back, things changed totally and he seldom tested me and kept saying busy. I like him and even call him sometimes. I would like to know if I should continue chasing my happiness or just let him go and move on to next one.