I'm sorry you have to go through this L.B I know what it's like. I had to put down my 2 dogs over the last 4 years. Both times it just tore me up. I didn't go to work for a few days because I was too depressed. They were like my kids. Roxy my Rott was 12 I got her when I was 17 she was the greatest dog I could have ever asked for. Ilana my Rot/Lab I saved from the pound she was only 7 which made it extremely hard to let her go because it happened so fast and was so unexpected. Roxy had cancer and Ilana had kidney failure so it needed to be done on both occasions. But that didn't make it any easier. I like to think that Roxy & Ilana are hanging out together at some dog park in the sky waiting for me to join them and one day I will.
A few months after putting Ilana down I went to a pet expo and stumbled across this little Dalmatian puppy. After walking around the fair grounds for a few hours I went back and adopted him and named him Lucas.
While Lucas will never replace Roxy our Ilana he has become a big part of my life and has helped me move on.
It's probably way too soon for you to think about right now. But in time you might find another dog that you can offer a good life to and maybe that will help you too.
I'm sure you gave Puddin a great life and He will always love you for that.
R.I.P Puddin