Marriage Law

i am 21 years old and had affair with guy which has totally different caste. and his parents came to know about it and they forcefully made him engage.as the family warn him that they will do suicide if he don't agree. and now done with engagement because of the parents will. but he is not satisfied neither i.so in future can he break that engagement that they had and have court marriage with me. and will law will protect us from doing that