I have a one yr Corgi. He is a Wonderful loving dog. I did not fix him becAuse he was a gif from a friend who wants a pup from him... All was fine until I now see he's unhappy... pacing,crying, trying to get out to the road,howling whiLe in his KennEl which he use to love. We tried breeding with his breeder but he wasn't interested. She tried the vet but he couldn't get him to do it. My question. Should I feel so guilty about this? Keeping me up at night. Should I fix him and forget my promise to a friend? Should I explain to her how sad he is? I lost here

There's probably a dog in heat nearby (or not so nearby; he can smell her far away).
When did you try breeding at his breeder? Maybe he wasn't old enough yet.
I don't understand 'She tried the vet but he couldn't get him to do it.'
You should have course tell your friend everything, and discuss what to do next. Maybe your dog could stay with him or her for a week.

Absolutely desex him, it is completely unreasonable of your "friend" to expect you to let your dog have a litter of puppies just for HER benefit!