PLEASE ADVICE ME I NEED HELP

i am a young graduate from akwa ibom state i am staff working with first bank. i have a young girl i want to marry i love this girl very much i have done every thing for her, i have seen thier parent and we fix a date for the traditional marrage i have never have sex with her,so one day i walk with her to my doctor for test , unfortunate for her she was confirm H I V POSITIVE SO WHAT SHOULD I DO i need ur advice please