Want to know which type of cases of a live-in relationship will court accepts

A 23 years girl had one relationship, she broke up with him and went into second relationship with another guy. In second relationship, the current lover asked the girl to give money, she took loans from bank, her gold and money given to him. As time pass, she is unable forget the ex-boy friend of previous relation and felt bad. After realizing her mistake in previous relation, abusing from current lover in daily life, she broke up the second relationship. Now the ex-lover who took loans, gold and money is not even paying back to her even after 1 year of breakup. In return he is blackmailing with photos and videos which taken in relation and saying that he will file a cheating case of breaking up the relationship. Is it really illegal, if a girl don't want to continue the live-in relation, then can't she breakup? Is there any law to file a case to get the money back? Above mentioned relationships are not marriage. These are live-in relation.