Sorry to hear that. You sure can get attached to them. He's just beautiful. Lhasa or Tzu? They look very similar sometimes.
He was a Shih-Tzu. Mom and Dad were both champion lines, but Stormy just was a good little pet. When I would travel for work, as soon as the suitcase came out, he would jump in to tell me he wanted to go with me!
Yes, some lines are very close in appearance. I had a Lhasa before Stormy and they looked a lot alike. Smart little guys, too. The Llasa could tell what word you would spell, and to get the appropriate toy. He knew all his toys by name.
If you know anyone who raises these dogs, let me know.