Snugs Is Gone- And I Am Struggling To Cope, What now? Options

[Sad parent]

My darling boy is gone. His cremation was today. I decided to observe the cremation. I was nervous, but I am glad I did this. It was a last chance to touch his soft fur. I am still struggling to move on. Everything I look at reminds me of him and then I feel so sad and empty. I am crying less now than I did a week ago, which is when my boy died. I have been reaching out for support, which is not easy for me. I even attended a pet loss grief support group.
How do I ever get another cat, when I will always compare that cat to my perfect Snugs, I can't imagine how I can be a good parent to another cat. I also don't want to go though this again.
My boy Snugs was beautiful, intelligent, and had a great personality.
Since he used to sleep with me, I am still having trouble sleeping. I know I took good care of Him, but there are times when I am filled with guilt, wishing I gave him more attention. I took him to his vet for regular exams, but I didn't know how important it was to have his blood pressure checked as he grew older. His regular vet never brought it up until it was too late. With vision problems and kidney problems, he bravely continued on a couple of more years, I wish I could go back in time and check his blood pressure before he had problems.

[Sad parent]

I am so sad, missing my boy Snugs. It is still so hard to believe that he is gone . I can tear myself up thinking about things I wish I had done - more hugs, more pictures, more time with him. I was so attached to him. He helped me through some of the toughest times in my life. The pain is constant. I can sometimes distract myself and briefly get some relief.
He died Sept 21. It seems only yesterday. It is horrible to choose euthanasia. I can easily forget why I made that decision.
I have to remind myself that he was not eating and was starting to have problems walking. It feels that his decline was sudden. I think I didn't want to face what was happening. I wish this was all a nightmare and I could wake up.
I start to question what is important and what matters. There is a dark cloud over me and I don't know if it will ever move away. I know I am not the only one who has felt this way. I can't imagine how people survive this.