You have accrued enough unlawful presence to trigger a ten year period of ineligibility. If you stay you cannot adjust your status (due to illegal entry you have no status to adjust), and if you leave you would have to get your ineligibility to reenter waived before you can lawfully reenter the United States (presumably on the basis of hardship to your by-then husband). There does not appear to be a "dream act" or similar immigration reform bill on the horizon. I suggest consulting an immigration lawyer about the possibility of getting a waiver of your ineligibility after leaving the U.S.