So, I met this guy 5 years ago online. And he lives far away

So, I met this guy 5 years ago online. And he lives far away from me and he has came up and visited me a couple of times. He used to have a crush on me and when he came up here we dated. But he says he wants to be friends now.. But he confuses me because he has a girlfriend, and he just recently came up last week and left yesterday. It doesn't make any sense to mewhy he's coming up.. And when he visits, he flirts with me a lot.. And when he went to the airport yesterday to go home, he was telling my Dad that he wanted to suprise me by coming up again and not telling me. If he didn't like me more than a friend wouldn't you think that he wouldn't come up at all and just spend time with his girlfriend?? Please respond, I need help..