Mohan Kumar has been arrested. Bengaluru: Faith in her boyfriend and his promise of marrying her has led to a 20-year-old from Bengaluru losing Rs 2.5 crore of her family’s money. The boyfriend used videos of him getting intimate with her to blackmail her into also giving him jewellery, expensive watches and even a high-end car.  The blackmail continued for months until the victim could not take it anymore and approached the police recently, leading to the boyfriend’s arrest.  Police officials said the woman, who is now 20, met her boyfriend Mohan Kumar when they were both in boarding school. They became good friends, but lost touch. They met again years later and fell in love.  Kumar promised the woman that he would marry her and the couple went on trips together. During such trips, Kumar made videos of them getting intimate, assuring her that he was only doing it for himself.  In some of the videos, Kumar ensured that his face was not visible and then began using them to blackmail the woman. He …