Based on the facts you have presented, you are subject to deportation at this point due to the overstay. Further, if you leave the U.S. you are subject to a ten-year bar from reentering as you have accrued over one-year of unlawful presence. The primary avenue for obtaining permanent resident status for you is through marriage to a U.S. citizen. However, you cannot marry this person solely for an immigration purpose.
Consult with an immigration attorney as soon as possible.