Oh Kim, we had the same thing earlier this year too, same age as well. I'm sorry for your loss and it's not fair, but at least he's not in pain.
My dog (back in perth) was slowly dying and it was just so cruel, he would just fall over all the time and couldnt even stand to eat or go to the toilet. I know it's going to be hard for me when i go back to perth for a visit and he doesnt come up to see me
Try and remember him for all the happy times when he was happy and know that he felt loved when he went. Big hugs to you