We each have a story to tell. But not everyone should hear every part of the whole story. Discernment with wisdom and Holy Spirit guidance should tell you what to say and when.
We should not be afraid to share with people, but sometimes we are surrounded by hypocrites who pretend to be friends. Be careful that you don't cast your pearls before swine, lest they turn and trample you. A real friend will not abandon you or betray you. Anyone claiming to be a friend will not be a Judas.
When misfortune or disease enters your life, you find out who your friends are. Some are uncomfortable or frightened when faced with the inequities of life and they will run from you in your hour of need. You must forgive them. But don't entrust yourself to them. Take the opportunity to lean further into His arms, and let your trust in Him grow. Having this disease not only is the catalyst for trusting God more and more, it encourages you to release your grip on whatever is not priority and hold fast to that which is most dear to you (Jesus Himself). Our motto should be, "to know Him and make Him known".