It is not about converting or wearing abaya, marriage in arab world is more complicated. As arab mentality one can forgive many things and accept many differences but there are some things out of control such as a simple example if you are't verigin be sure he will never marry you or will marry you for only physical attraction but you will be always in shade untill he leave or feel unintersted. But if you planning for some money so go ahead otherwise it is no way
i tried before and it is not working at the end no matter you or him tried to work out.....sorry for being realistic