Don't let ANYONE try to make you feel bad about grieving a pet. I didn't see the deleted comment but grief is grief, regardless of who or what is being grieved.
I've been through it, OP. I even cried in a primal way and didn't care if the neighbour heard, I couldn't stop it even if I wanted to. It hurts to the bones.
We spend hours, daily, nightly sometimes, with a creature who can't talk but they still communicate. We pick up on their ways, as they do ours, somehow we have a special connection and their lives become entwined with ours. Mutually we have an effect on each others moods, personalities, lifestyles. That's scientifically proven, though those who live it know it anyway.
A house that always felt like home because you could always feel them there, even before you saw them. The pitter patter of paws that became general background noise, suddenly not being there, seems to make the house sound hollow without them. Even the annoying things they did, we miss it. The little looks they'd give, the way they'd react when they knew it was walk time or dinner time... Literally their entire lives are entwined with ours.
How the hell can anyone say a pet is just a 'pet.' We bond with them. We grow with them. We live part of our lives around their entire life. Ofcourse we notice when that's gone. We notice everything and it hits us bit by bit. All these years later and there's still songs I can't listen to, still walks that instantly remind me of him and I can feel the tears coming and have to control it, as they will always remind me of my boy.
Just ride each day out, OP. Those that don't understand, likely never loved or was loved by an animal to the extent that they literally ingrained/imprinted themselves on to eachother. That's special.
Sorry this was longer than I wanted. Whether it's a human, hamster, cat, dog, horse... A lost life is worth grieving when the bond is so strong, take that pain and remember, it hurts because of how loved and how bonded yous were. Your day to day life has instantly changed and it's all strange to you now but... One morning you'll feel the pain still but will cope a little better. And we just carry on learning to cope without them because that's all we can do. ❤️