You are still a wife for this husband. You cannot get married to another man except when your marriage tie is ended. There are two ways of ending this tie. Either to contact him and ask him for divorce or for Khul`.

 

Khul` is conducted by returning the whole dowry or a part of it.

 

If you cannot reach him you can contact a judge or the imam of your Islamic center and he (the imam) can divorce you because of the financial duties he does not pay or because of the greater harm inflicted on you due to his absence.

 

An imam of the Islamic center should have the right and power to do so. This should be done without having any conflict with current laws of the country where you live.