I read this earlier today and just could not find the words to express how sorry I am for your loss. After reading your post once again, I can tell how much you love the little guy and also how much love he brought to you.
I sit here looking at my two girls sleeping and dread when "that" day comes. It is unfortunate that our little Furry Kids get to spend so little time with us. I am reminded of a story about a family that had an old dog whose time had come. The family was not sure whether to have their young son in the room with the vet but decided that they would all be there as a family. After it was over they looked at the boy to make sure that he was alright, they were all crying. He looked at them and said I know why dogs do not live as long as people. They looked at him and ask why, he said that Dogs are born knowing how to love unconditionally where we have to grow up to understand that. (I know I did not write this exactly as I originally saw it but I had to share it with you)