I have a cousin that came home one day and found her daughter in bed with another girl. She contacted me expecting advice on how to change her daughter. I surprised her by saying that her relationship with her daughter was more important than her daughter's sexual orientation. She took my advice and now she says she has two daughters since her daughter is in a monogamous relationship for the past 7 years. So I wish you good luck and I believe your parents will come around. Just be patient and give them time to accept you as you are not as they want you to be.