I read through your posts since Otto died and noticed that your family hadn't noticed Otto was sick, and you were still away when he passed. I can see why this makes losing him so much more difficult. However, many budgie illnesses are not "curable" by the time it becomes apparent that the bird is sick. Many budgies die from tumors, liver disease, or organ failure and these don't respond well to treatment. Otto gave you a lot of joy and he loved you, too. You ask how you can go on and that's understandable because that's how all people feel when the love of their life, human or animal, has left them, especially so suddenly and unexpectedly. You go on because you need to. You WILL survive this devastating loss. It WILL get easier with time.