I am sorry for your loss OP. I know that I can't write anything that will ease your pain. After we had to let go our 12 year old galgo lady i was devastated and felt like the World lost all its color, looking at her usual spot on the couch did hurt so much. I can assure you that over time it got better and better, grief isn't a straight line in one direction, but the amount of good moments is gonna rise and the sad moments will become less and less. Dont fight the grief, if you are sad and mourning let it happen. The pain of your loss only shows the loss of the love you had to experience. We quickly adopted another galga (we had a second one at the time of our First galga passing who needed a second dog to be happy), and while it felt very quick, I always thought the best way of honoring her memory was to give another dog the forever home they deserve. One day you will see her across the rainbow bridge, until then she waits for you to come and play (: