My heart goes out to you during this time.
You may not be ready to hear this but please don't shutter yourself away, thinking that you will never find another Master. You are right--you can't replace someone so unique. However, that doesn't mean that someday, when your heart and mind are ready, that you won't find someone else who can master you in a different, yet fullfilling way. The best thing you can do is live your life as Dragon would have wanted you to do.