No he cannot seek nullity of marriage in the given scenario. However, your husband may file for divorce against you. Your legal remedies lie in seeking a right to residence in your matrimonial house under Domestic Violence Act. Legally speaking, till the time divorce is granted by the court you cannot be removed from your matrimonial home. You have sufficient legal remedies but the prerogative to pursue them is yours. It is true that your husband may file a case of divorce against you but you will get sufficient opportunity to contest any such case fittingly through your lawyer.