He ended his days in the happiest way he could have. Snuggled up, warm in safe in a loving home. It sounds like he went peacefully in his sleep, after one last day playing happily and of course I'm sure enjoying being eye candy for those little girls next door.
I'm so sorry for your loss. I know how much you loved him, you've posted pictures of him before. I had never heard of a 'skinny pig' before! He was a unique guy and I'm sure was lucky to have you around! <3