For what it's worth Axel...
My brother-in-law's brother's dog was going through some major health issues, so my B-I-L-B took him into the vet. The vet basically said the same thing to him as what you're discribing what was said to you. "He's uncomfortable for now, and medication won't cure, but will make him more comfortable."
But as stated in this thread, sometimes dogs will let you know when they are done.
Getting back to the vet visit, my B-I-L-B and the vet then looked at the dog, which had been walking on its own on the floor. It was at a plug in socket at the wall, licking it. They took this as a pretty convincing sign, and they made that hard decision.
I'm sure when you're little feller is ready, he'll let you know.
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