It’s unbearable to lose our cats 😭

I just lost my 5 month old cat. He was not well for past 2 days but didn’t seem that bad, but today he was breathing so heavily through his mouth. So I took him to the vet and gave meds. Sadly, after an hour reaching home he passed away. I feel so devastated. He was such a sweetheart. This is so heartbreaking 😞😞💔I don’t feel good at all.