I´m so sad you are not here and I miss you so much in my life. I thought you would be forever with me. I miss to hear your little paws on the parquet, I miss your "miaow" in front of my bed in the middle of the night, I miss to come back home and there is nobody who says "hello" to me when I open the door of the car.
The vet wrote us a little note: " don´t be sad I had to go, be happy I was there with you".