Brother,
thats, very sad to hear. I think that if she does not think that you are the one for her then there is nothing much you can do. I think that you as a man - need to understand that she needs to want you because you are special. There will never be another man like you - ever. Its her loss not yours if she does not want to be with you. You are a son of God. So look to God and he will bring you out of this.

Bless you,

 Why just female?