American citizenship

You will be able to apply for citizenship 3 years after marrying an american citizen (5 years after getting your permanent resident status if you did not marry an american citizen). To be eligible, you will have to be a resident of the United States, and pass a naturalization examination (which involves a english test, a cultural/history test , and pledging allegiance to the United States.)  As usual, you will find more detailed information on the uscsis website.