Not able to move on

Hi Everyone...

First time Iam experiencing this in my life now. I'm 27 now. First time I liked someone this much. I feel like being with him all the time. I say "I love him". He says "he likes me and cares for me". We have been physically close. He is in different city. Whenever we meet v come physically close. After that I keep missing him, want to talk to him. But he becomes busy in his work. He doesnt call, I keep expecting, I get hurt. He says its not necessary that he should call everyday to express. Its just that he feels for me. Sometimes 2 weeks pass and he doesnt bother to talk to me. And everytime I end up calling him/texting him. He never shouts on me and when I ask "why didnt he call me", he says "he was busy" as usual. When he will be coming to my city for his professional work, he ll let me know, meet and come close and will say "he likes being with me". He is also never forceful physically. He says "if I dont like being with him, then its ok, he ll go away. But I always get hurt because after this he goes to his city and busy in his professional and personal life. I feel for him in every way - emotionally, physically. But I dont understand him that what way he likes me. He just says one thing that he cares for me and feel like coming close to me. when I talk or ask about his personal life, he doesnt respond well. He says how does it matter. He says he never asks me about my personal life then why do I ask. But Im completely attached to him. I just cant get him off my mind. Its pretty much sure that v can not be together. Because after some time when he realized that Im getting emotionally involved more n more, then he told that he is committed with someone else. He says how does it matter to me if he is with smone else, he cares for me, meets me and will be the same. Im completely lost. Plz help !!! Is it normal to feel this way?