Sadly, I too know what you're going through.
It was a year in June that we had to have our Lizzie put to sleep.
For months everytime I thought of her all I saw was the way she looked the last few days of her life.
Then I realized she only looked that way for a few short days and for the other (much to short) 7 years of her life that she was a big, beautiful orange and white girl and that's what I needed to remember.
I found a picture of her with her beloved Sister Gracie from when they were about 5 years old, they were laying together on our bed and they looked so adorable that I took their picture.
I framed that picture and it sits on the armour in our living room.
Everytime I feel sad about her, I look at that picture and it helps.
I helps me to remember that even though she had a short life, she had a happy life and she was loved very, very much
So when you feel sad about your boy, just look at a picture of him when he was health and remember even though he's not here on earth with you right now that he's at the bridge with all the other TCS babies and he's healthy and happy once again and that he's waiting for you.