@snorkmaiden68
it's ok to feel the way you do. It is, and nobody can tell you otherwise.
I felt sick for weeks, if not months, when I lost ShotsCat1.
I couldn't even bring myself to move her bowls for ages, and when I locked the cat flap I broke down. Even now, 6 years on I still fill up if I think too long about her; and that is 6 years of fostering cats and eventually leading up to owning being owned by ShotsCat2.
One thing I am glad I did though, was write a long and painfully heartfelt eulogy on a similar pet forum to this, ony a day or two after she died. I saved it and when I go back and read it now, I cry my heart out, but it also makes me feel so happy she was in my life. Maybe that would help - even if not published, just to write your story together.
At the time, kind people I knew told me that I will never forget her, and that as and when a new puss (and it will be the right one, the King of Cats makes it so) comes along, they will never replace a previous cat, they will just find more room in your heart for themselves. And it is true. Be happy you gave her love and the best life she could have had, not sad she died (feeling that massive love).