I've had a CF crush before...first of all, it was long distance, and long distance relationships DON'T work out (unless the two eventually get back together to court for some months before considering marriage!); based on my personal experience!!
Back in those days, where CF'rs could see CF'rs without cross contamination was great, and the romanticism about it all was having the same health problems and being able to be constructive in beating each other (PDT)! Besides, possibly saving money on meds, cause the same ones are probably being used anyways!