I request you to think atleast 10 times before going ahead with your plan. Because at this age, guys fails to take right decision and ultimately suffers rest of the life.
Even if you have decided to marry, you can go to the marriage officer of your (boys/girls) locality, and put an application for marriage under Special Marriage Act. Under this Act, you boh are eligible for marriage. The M.O will ask you for proof of your marriage, so be ready to prove it. You may also contact a local lawyer who will help you to reach your goal.