As far as immigration is concerned withdrawing your case will subject you to a Notice to Appear before the Immigration court and you should have a lawyer with you as the proceedings can sometimes be daunting.
If however you feel you have been abused, and its not limited to physical abuse, you can contact an immigration lawyer to file a VAWA application on your behalf.
Although its the "Violence Against W omen's Act" it protects men as well who have suffered abuse at the hands of their LPR or US citizens spouses.
You will need evidence from the marriage, ensure you have all your belongings and evidence of your marriage including photographs, joint account statement, utility bills, the petitions filed, withdrawal notice, denied petitions,wife's birth certificate, etc.
With regards to the divorce you need to contact a divorce lawyer.