YOU mattered. I am sure you did. :) And..you matter now. You are helping me see though your eyes..ways to help my son.... THAT MATTERS!
Without a doubt. And for all the good that came in your sister's life, YOU were a key part of helping her live on happy and healthy! Not only that, buy like the first commenter said, YOU do matter now as you're a valuable voice in the online community giving insight into the life of a Type 3 sibling! Thank you for what you've done, and what you are doing.