Marriage is not a child game but it is life long relationship. Before going for it, the first and foremost important thing is to be economically independent. Nowadays, most of the marriage is happening love marriages in which 50% parents are found disagree with their children's decisions. But, young boys and girls are making alliances because they are financially independent. But, in your case, you didn't mention your qualification and job-related facts that means both of you are working or not. If both of you are working then go ahead for registered marriage. If not, then you should discuss with your family on this matter. If your parents are denying and you go against their wishes then whether is it sure that boy's family will have happy to you after marriage. Sometimes, boys make marry with a girl and after marriage, their mentality becomes change and start to pester the girl. In such a situation, the girl goes to her parent's house. But your parents already denied giving property to you if you make marry to that boy. So, you should convince your parents for this marriage.