I killed my dog last week. That's how it feels.
He was so young but had an incurable disease causing constant low level pain. He also had a number of other conditions that we were struggling to control. We sent him to specialists and tried everything but he was going to have to live with it for life. It's the sort of disease that you get under control, it lies dormant then flares up every few months but when it does it's horrible for weeks. He was so painful he struggled to eat or do much. Inbeteeen flare ups he was so happy, beautiful and we had so much fun.
He was stressed, nervous, scared of strangers and dogs. Probably from all of the treatment as a puppy. He was frightened on walks. Frightened to be touched by anyone but me. Frightened to play with dogs and couldn't go for proper walks for fear of meeting anything scary. He wasn't aggressive but was terrified. We couldn't take him anywhere and couldn't leave him with anyone as he panicked without me.
He went under Ga for another investigation and I told them not to wake him up. There was no real reason, nothing drastic found except the usual flare up he has every 3 months or so. I brought it up not the vet. I can't understand why I did this.
He was so full of love and life but I couldn't live with the thought of him painful and stressed any more. He was just a baby, my dream dog, my best friend. I spent every hour of every day with him.
I didn't get to say goodbye. I should have woken him up and told him I loved him so much. He died not knowing. He was so scared going into the vet for more treatment he tried to stay with me but I pushed him in, he knew what was coming and he shouldn't have died hungry and scared 
I had no idea it would be the last time I saw him. It's happened so many times before I didn't even say goodbye.
Now I'm broken, there's no one waiting for me when I return. I work from home and my foot warmer is gone and the guilt is killing me. I've made a huge mistake I can't take back, he needed more time and wasn't ready. I wasn't ready.
There's no point to this post other than to write it down but I can't talk to anyone in real as it's just a dog and I feel I'm mad 