Regarding my love life and marriage

Hi, Me n my guy have been in a relationship for 8 months now. I had been to UK for a onsite deputation for a period of 6 months (from Sept 2011- March 2012). He had been my housemate. After being his friend for 2-2.5 months , I started falling for him. We belong to different states of India (He is from Tamil Nadu and I'm from Maharashtra). I was getting attracted to him ,rather was getting emotionally bonded to him very fast. Apart from face to face convos (which were very friendly and involved other housemates too ) we also used to chat over whatsapp. Gradually, he started understanding that he was more than a friend to me. Without being direct, he said that we should sit and talk abt it. So finally in the last month (March 2012) I decided to express my feelings to him. It was just 3 days prior to my leaving time. I expressed my feelings for him and he confessed that he has been in love with me as well. We both further discussed about convincing our parents. We knew that t would be extremely difficult, but we were confident that we aould give a fight for our love and convince our parents somehow. Those 3 days (14 March -17 March),after we expressed our love for each other, have been the most beautiful days of my life.I realized he was so much in love with me, and he was so hurt about me having to leave. He used to keep saying , why didnt to say all these things earlier and used to get very emotional. On the airport as well, we both got very emotional, but as we had not revealed about our relationship to our other housemates cum friends, we could not even hug each other. After coming back to India,we used to talk over phone everyday and used to be constantly be in touch on whatsapp. Occassionaly we used to meet on Skype. This went on for 4 months (till July 2012). He was supposed to come to India for abt 3 weeks in the month of Sept. We used to make plans every other day about meetig when he comes down to India. We had decided to meet for 3 days in India. He'll come down to Mumbai and will be together for 3 days. We both were longing to Sept like anything. He had also told me that he has talked about us to his Mom. His Mom didnt say anything , but she didnt agree as well.He said when he comes down to India, and I'm very sure that he had not been fooling around with me about this.All was going well, we had been immensely in love with each other and used to crave to be together.Then, he had some meeting with one of his project Director. That day everything changed. He realised that , since we had been together , he has not been concentrating on his work and has fallen back in performance. Nothing in work had been going as per his plans. We talked about it , and he decided that he didnt want to be in this relationship and work is priority. I pleaded a lot to him, I even agreed to wait until he sorts out everything. But he didnt agree, he said that even he fels terrible and knows that he is hurtig me , but he has to do it. He said as it is , our relationship would not be approved by our parents , then there is no point in continuing this relationship as it would hurt both of us more later on. I still kept pleading to him but he didnt agree. He stopped calling me altogether and Skype was completely out of question.However, we used to chat on whatsapp after that, but everything had changed, he used to sound very irritated..he used to always be occupied with work and used to always say that he is very busy. Afetr a month (ealry days of August), I had called him to wish him 'Friendship's Day'. We just spoke for 2 secs, but for the rest of the day he was talking very nicely on whatsapp. He asked about my whereabts and sounded very caring and affectionate. By the end of the day finally he told me that after talking to me in the morning he kind of started missing me.We talked a lot, he also said that his old memories are getting refreshed and he isfeeling good about it. He just kept saying that I like the way we are now.I jsut dont want to give you any false hopes and then not stand by you. I kept convincing him. He didnt assure about being back into the relationship but promised that he would meet me atleast for a day when he comes down to India.However, immediately next week, he started behaving the same way. He started getting irritated and kept saying that he doen't want to get diverted again. Finaly he came to India at the end of August.But then due to his Dad's health problems and other financial issues, I didnt mention about our meeting. Once when he was in a good mood and didnt seem to be busy, I asked him whether I could come to see him off. he didnt agree, he kept saying that anyone would have said yes but doesnt want to as it would hurt me only. I was trying to convince him, but then he avoided the topic by saying that we would discuss about it later. I knew he wont discuss it again , so I decided that I'll goto the airport without asking him. The day when he was leaving , I informed him I'll come down to Chennai airport to see him off. He was annoyed, but I knew somewhere in his heart he wanted to see me as well. When we met on the airport , it was just awesome. I realized, it had been actually such a long time that I have had a real smile on face. I just forgot about everything, it didnt seem that things had gone wrong between us. But,he said one thing, he said that he was expecting that I would be interrogating him. I had never felt about interrogating him, I just wanted to be with him and for those two hours I was so happy , I never been so happy ever. Also, one important thing, his eyes said everything, there was so much love in his eyes, he kept looking at me, felt as if he will cry. We both kept talking, so much so, we both were getting late for our flights but didnt even realize it. We just didnt want to leave. It would sound complete filmy, but when we were leaving , we walked a few steps and turned around to look at each other at the same time. Everything of those two hours was jsut mesmerizing!!! I realised that he still has feelings for me , as strong as I've for him, but he just wants to hold back his emotions. The next day when he landed, everything had been good that day as well. But when again he joined his office the next day, he went back to old bad mood. After that we talked over phone once or twice, but it was not good. All the time I felt that I had been the only one who was interested in talking and he was just getting annoyed because of me. After all the experience that I hadve about both of us, I understand that he is scared that, if he talks or stays in touch with me, he'll lose focus and for him to lose focus for a relationship that his parents wont approve is not right. But I want to make him understand, that if we love each other we can convince our parents and until and unless and unless he sorts out all his work related issues I'm ready to wait for him. Please advise what should I do? How should I convince him? Our relationship is very important for me and I know, we'll be happy with each other. I know my guy,he'll act rude but actually very emotional and he hates that I understand all this. Please advise, please!!