I never posted on Bear's thread when he was sick, but I followed it. I can't imagine how you feel. You really are a role model for chin owners. That's how I feel anyways, I always imagine you as a mom-like figure in your knowledge even though I think you're young (not sure, but regardless...).
You took the best possible care of him, and that's all anyone ever needs or wants. No matter what happened you TOOK CARE of him. You did what you set out to do. You nursed him in ill health, you watched him, you entertained him, you fed him and you loved him. Think of it less as a loss and more of a mission completed. Your goal was to do everything in Bear's best interest and you accomplished that. That's something to admire.
So in lieu of saying how sorry I am for your loss (although I am of course) I am going to say congratulations on being an incredible care taker to the lovely Bear, among many others.