The film, described as a Bollywood version of Brokeback Mountain, is the first production in Indian cinema to show a gay screen kiss.
The actor spoke to Digital Spy about the controversy the release has generated, saying: "Recently I received threatening mails, in which it was written that this film would corrupt society and that homosexuality is part of western culture.
"They said that we would be damaging society if it releases, and the consequences would be bad for us."
Sharma also revealed that he had been forced to take police protection after taking part in the feature, for which he also wrote the screenplay.
"Political party workers came down to my building to protest until the police took good care of the situation. I am scared that they may create a further scene on release of the film, but let us hope for the best," said the debut actor.
Veteran stars Zeenat Aman, Helen and Kabir Bedi appear alongside Sharma and Yuvraaj Parashar in the project, which releases in India on November 12.