well if its just you then were in the same boat. I had a labradoodle and he started having some issues. I did not want to live with him anymore as these issues were a threat to people and himself. The humane thing is to stop the suffering. A dog cannot be a dog if it cannot fetch, run, etc.. I moved on and now have a goldendoodle! puppy of course
you will be depressed for about a week but then it gets better.