this was the thing with my boyfriend when i came out to him as FtM. He loved me and he said he would go gay for me. but, in the end it just didnt work. he still saw me as a girl. We had to breakup because he wanted a girlfriend and i just couldnt give him that. You might have to let things go...hes striaght and wants a girl, unfortunatly you cant change who you are for him. I do know there are FtMs whos realationships do work out, mine just didnt haha Hopefully you guys can stay together, it'll just take some hard work on his part haha
