i have a problem with a japanese guy?

I found this guy when I subscribed in a facebook group for girls looking for a japanese boyfriend. I posted a post about me, saying that I was a teenage girl from Italy; he started commenting it and then we started chatting; he talked all the time about Italian things, italian restaurants in Japan, the places he visited, italian artists etc.; I commented about the places he visited. He made most of the talking and I just had little "room" to speak, which made me feel a little overwhelmed. After just a few days we started talking less. I sent him some messages but he didn't answer even if he already was online: he usually answered a day later; when I asked him questions to keep the conversation going he would just answer briefly, showing little interest in what I said. I sent him few messages because I wanted to avoid being annoying. He didn't answer to my last message which I sent yesterday. Today he was online, posting things in the group and ignoring me :(

I wasn't particularly sad because he wasn't my type, he was much older than me and he was a bit ugly but I really disliked the way he treated me: he could had kept me as a friend!

Another problem is that he is one of the admins of the group and I fear he might talk behind my back with other users, ruining my possibilities of getting a boyfriend. What should I do? And how can I find japanese guys in Italy? Should I unfriend him (he is my friend on Facebook)?