First help yourself. Accept yourself. Don’t be in guilt. It’s natural. God has made different types of people. Nothing wrong in it. Give your parents some time to understand and accept this. If your feelings remain same and you marry then you will be ruining life of yourself, your partner and ofcourse, of family members of both sides. Please don’t do this in any circumstances. The girl will come with lots of dreams about new married life and her partner, which will be shattered after knowing the truth. Instead of coming under pressure, make efforts to convince your parents.