Yes, you can get married again and if you marry a US citizen, your US citizen spouse can petition for you and you can start the process all over again.  However, please keep in mind that if you were reported to the USCIS before as possibly being married for immigration purposes only, you may have a higher hurdle to overcome in proving that your new marriage is bona fide.  If it is then you should just be prepared to submit much stronger and more evidence to show that the new marriage is bona fide.