Hello BeaFlower! I think that it is incredible that you want to share your feelings with your family. Unfortunately, I did not find myself in the same situation as you are. My family actually approached me saying that I needed help. My bipolar was so strong that everyone noticed that something as off.. even before I did. The hardest part for me was not telling others that I have bipolar disorder, but telling myself. Day by day, it has become much easier for me to except.
I wish you the best of luck telling your family!