Should I continue emailing the guy I love somuch eventhough i know the feeling is not mutual?

I met a guy online and fell in love with him without meetng him in person. During the 6 month of our chats, I found out he has a facebook and there were filipinas on his account . I got hurt because he has them on his account and I was not. I created a fake account and added the girls there. They added me, then on one of them, I found a post from my ex online bf. A sweet message. I got hurt so much. I emailed my ex online bf and told him Im gonna look for another guy. I didnt tell him that I found out about the other girl. I kept it to myself. Even if we broke up,we still continued exchanging messages,not sweet anymore, just friendly ones. But even then,I still love him. Then one day, he told me he is in the Philippines, but he is not visiting me. I made an effort to find him and I did. But when we saw each other,he seemed so different. He couldnt look in my eyes and I felt that he wanted me to leave right away. And when we part ways, he just said, "nice to meet you". It was like words coming from someone who really doesnt care at all, he was not like even a friend to me, totally stranger! I was excited seeing him and overwhelmed so i didnt feel the hurt right away with his reaction to me. But I know, something was wrong. After the excitement,maybe a day after,I felt sad, and hurt because I know he doesnt want to meet me anymore before gong back to states, even before we meet he told me he will just emailed me when he return to US. I got lost,my mind couldnt comprehend anything that happened between us. But I feel pain. I loved this guy so much and even imagined taking care of him when he grows old. He is 11 years older than me, he is 47. He is still single,people around him in the place I found him at told me so. He is a very attractive man, look so younger than his age, very good body, everything I saw in him was great, even the personality inspite of the fact he didnt like me, I know and feel he is a good person. Its hard to get over him. Everyday, every minute he is always in my mind. My colleagues at work are telling me to forget him. I know if I were in their shoes ,I would say the same, forget him. Its easy to say, but hard to do, especially after seeing him. His voice, his looks, the discovery of his kindness, they were hard to forget. I admitted to him about my fake account in facebook that led me to find out about the other girl he had or has through email, thats few days after we met. I still want to continue my friendship with him but I dont know, if it would just made look so cheap as a woman, but it is what I feel, I want to keep the friendship we had although I made a lot of embaring things, and I know I made a bad impact on my personality because of him. Even when I sleep, sometimes when he enters my mind, I couldnt sleep anymore. I hope get over with this.