Another suggestion is ask him first if he has heard of CF(but say Cystic Fibrosis so he definitely knows what you are talking about). You never know if he knows someone else that has it, but if he doesnt then just tell him a little about it. Then tell him that you have it. If he then cant look past that then there are way better guys out there. I truly believe that there is a person for everyone and if he isnt it then dont worry because you will meet the right person some day that will love you for you...CF and all.