
im so sorry about your cat :( losing a pet is such an awful experience i dont have a manga recommendation but i hope you feel better soon i know it takes time, a lot of time, to not feel as if your chest is caving in on itself everytime you think about it, but letting yourself grieve and giving yourself time helps a lot

Losing a pet is such a difficult thing to go through. It’s not your fault. Unfortunately, there’s lot of dangers outside and we can’t protect our lovelies from all of them. By how much it’s tearing you apart, I’m sure your cat was very loved. Try playing a game to distract yourself, the experience is more immersive

I lost my dog on Friday. Her back legs had stopped working due to old age, and so we had to make the decision to put her down—only, I was on a train to another city while it happened.
The regret may never go away, but you have to believe that you had given your beloved pet a better life than they may have experienced on the streets.
Remember this; for that final day of tragedy, there were many joyous days that far outweigh it. If your cat was happy, then you should be too. Of course, it’s also okay to feel sad—you are human, you can feel both at once.
This may not help and is unfinished, but it’s fairly lighthearted and may provide a nice distraction for a while;
https://www.mangago.zone/read-manga/cat_on_the_hero_s_lap/

I'm so sorry for your lost, I deeply understand your feelings, and it's okay to feel sad but don't feel guilty, I'm more than 100% sure that you had given your cat a wonderful life with all the love, treats, his favorite places, etc Your cat loved you, and will always stay in your heart, pls don't blame yourself for anything
Let yourself grieve, somehow it even hurts me when you say all the things you have been going thru, I understand that so much. Stay strong, your cat is watching you from the heaven
I hope this manga could help
https://www.mangago.zone/read-manga/ojisama_to_neko/

First of all, I'm really sorry about ur pet. I have 3 cats and they're my whole world too, I can't even imagine living without even one of them. I hope ur pain fades away soon, love.
Idk what kind of manga will help u rn but here are some suggestions.
https://www.mangago.zone/read-manga/bebe_san_no_koibito/
This is about the relationship between an old cat and his teenage owner. At the end of the story we get a sneak peak of the cat's soul or whatever still watching over the owner, which I think is so sweet. And the cat's soul or whatever has a human form and looks happier
https://www.mangago.zone/read-manga/the_walking_cat_a_cats_eye_view_of_the_zombie_apocalypse/
This is about a cat's journey in a zombie apocalypse. He loses and finds multiple owners throughout the story.
The two below are purely about the relationship between a cat and it's owner. How they make each other feel less lonely, how they're by their side thru everything etc. Very wholesome:
https://www.mangago.zone/read-manga/ojisama_to_neko/
https://www.mangago.zone/read-manga/kanojo_to_kanojo_no_neko/
These are lighthearted, funny and cute ones.
https://www.mangago.zone/read-manga/neko_s_massage_salon/
https://www.mangago.zone/read-manga/fushigi_neko_no_kyuu_chan/
https://www.mangago.zone/read-manga/hiroware_koneko_to_moto_yakuza/
I hope atleast one of these help. Don't push urself to feel better as soon as possible it'll just leave a deeper scar. Let urself grieve the loss of ur baby. The pain fades away with time
My cat passed away on Monday at 6am due to a car! I try to keep reading to take my mind off things but it’s so hard going outside and not seeing him sleeping in his favorite spots! I’ve only slept 2-3 hours yesterday and only ate a meal at 10pm! I ate a bit today as well at 9pm! I feel so guilty that I can eat sleep breathe and wake up but he can’t! I can’t eat knowing he will never eat his favorite treat! Life is so unfair but I’m trying my best! We buried him next to some roses since he slept next to them! I put his bowls for food and water next to his grave and flowers and catnip! It’s so hard facing reality atm. I’ve never experienced pain this huge in my life. It’s like half of me is gone and I can’t move forward! I miss him horribly! If you have any tips on how to cope with this or any mangas or book that can help please share it with me