Ninaivirukkum Varai (1999)

Poor Janakiraman aka Jani (Prabhu Deva) and wealthy Sandiya (Keerthi Reddy) become friends near the beginning of the movie. As their friendship grows, Jani's friends (Dhamu, Jappan, Balu, and Arun Sarrat) begin to think it's love. To top it off, Jani's mother (Sujatha) believes the same, and all of them together get Jani loving her. When Jani goes to Sandiya to declare his love to her, she shows him pictures of a lot of prospective grooms and asks him to pick one out for her. Hiding his feelings, he looks through them, and picks a minister's son (Anand) out for her. Jani then goes through the hero's usual torment of loving a girl and not being able to tell her so and making all kinds of sacrifices for her, such as hiding the death of his mother until after her betrothal. Nearing the marriage though, Jani learns that the husband he has picked out for her is actually immoral and has a venereal disease, and goes to try to break up the marriage.