why now?

I dated a guy two years ago over the summer and I'm not going to lie I fell hard. It was all flowing so naturally. I met his parents by coincidence at a church activity. And he met mine when they surprised me for a visit. Everything was going well. And then we had a scary thing happen. We had sex! We were planning on it so we got the morning after pill. And the next morning we met her parents at the mall of San Juan for brunch. We said goodbye because we lived in town about an hour away from each other. When I got home I got a text that we needed to see each other and talk. When I saw him the next day he explained that he was feeling like we should end things. I asked him to reconsider because I really cared about him. But he said no and I asked him one last pathetic time to let me make him happy. He said No.  And that was the end. So I broke all communication with him. We have friends in common so through them we know how the other is doing. Fast forward 2 years and a girlfriend later. Living my life 3,000 miles away.  I don't know how he got my number butt he sends me a "hi, how are." I was polite and asked how things were and how his parents were and let the conversation die there. A month later and I'm still thinking about him. I told him he needed to just leave me alone because I was thinking of him and it simply wasn't fair. He says, it wasn't his intention that he just wanted to hear from me. I sent "why?" 1 day ago and he's seen it but no reply. Why is he doing this to me?