Boyfriend denying to marry girl after promising for marriage

In 2004, this boy from patna proposed to me while we were in college. Since then v had been in a relationship where i also financially helped him a lot. He had committed for marriage back then and had numerous times revisited his commitment to my parents. But his mother was apparently against intercaste marriage. He maintained that he will get her on board for marriage to me and my parents. I had met majority of his family members except his father. We all shared cordial relation except for his mother due myself belonging to SC status. Everything was fine even till this august 3 or 4, when suddenly he went out of delhi and his family cut ties to me. I had been telling him of marriage and he was consenting till this date. However, upon moving out of delhi, he reiterated how his family guruji had given negative reviews about our marriage (something he had been telling me since 2006-07, but overridden it to continue relation even till now), now he is reluctant. Can something be done?