Loss and grief resulting from death of a pet

Something that doesn't get talked about often is loss and grief resulting from the death of a beloved pet. I've been through this, it's almost as devastating as the loss and grief of a loved person in your life. I had to have to have my beloved cat, Pepe, put to sleep because he was too ill to carry on a meaningful existence. This cat was MORE than JUST a cat to me. He was my best buddy, always there to greet me when I would come home. He never left my side, except to eat or use his litter box. He sat and slept right next to me on our couch, and would often come into my bedroom at night and sleep right up by my face in the crook of my arm. So, when he passed I was devastated. I went in with him when he was put to sleep, to comfort him, and to give ME closure. Knowing that, yes, he was no longer with us. It took me a couple weeks to REALLY get over his death. I went through periods of anger and denial. I checked out a couple books from my local library on how to deal with the loss of a beloved pet. These books, although I don't recall their titles,(this was over 11 years ago) were very helpful in dealing with my loss. I've read about, and have actually READ parts of Fred Rogers' (Mr. Rogers Neighborhood) book on dealing with the loss off a pet, and the parts I've read are fantastic. Wonderfully gentle, kind, and caring. Does anyone else want to share their experience(s) in losing a beloved pet? Thank you for your time.