I am not bipolar but I do believe that if someone loves you they accept your illness too. You wouldn't give up on your child with a disease would you. Sometimes the family members need support as well. Let him know you understand it is hard on him but that it is who you are and it may be tough sometimes. If he loves you he'll try. If not then it shouldn't be something you feel bad about. Many people have waited years to find the right person, some get lucky the first time. Just keep your chin up and remember to take care of yourself. All illnesses require continual self care.