Me and my fiance are a good match for each other, very devoted Muslims, but his father does approve of our marraige because I am a convert. Will Allah bless our marraige union if we decide to marry? His mother and other family approve of our marraige, but his father is difficult and wants him to marry a local girl. My fiance love each other so much, please advise.
Islam lays a lot of emphasis on a person keeping his parents happy. The Prophet (saw) has said, "Allah is happy when your parents are happy, and Allah is angry when your parents are angry", so he should try what he can to keep his parents happy.
At the same time, the Prophet (Saw) has said, that when an appropriate partner is found (for a man or woman), then the parent or guardian should get them married.
In that sense, if you really are a good person, it is wrong for his father to stop you two getting married. But he is in a difficult situation too, as he should try to keep his parents happy too.
From a legal perspective, he doesnt need permission from his father to marry, so if he wants to go ahead with the marriage, it is done.
However, my advice is for you to give him time to convince his father. You should meet the mother, and other female relatives, take them out for meals, socialise with them, etc, and get gifts for the father on Eid day, and other celebrations, so that you become more like family. If the mother is happy, she may be able to slowly convince him to let the two of you marry, and a marriage that has the blessing and happiness of both parents is always going to be more successful than one that only has the support of one parent.
May Allah make it easy for you, and may he make the father agree to letting him marry you. ameem