I feel for you @ Jhonny, it is as though a part of your heart has been lost. Several years ago (the last pet I had). I think cats are pretty psychic animals and in tune to people and the earth around us.
I had a lovely male cat, I was living in a rural area of BC at the time, he lived indoors as a kitten, but as he grew, (like adults) he wanted to discover the great outdoors, he loved it, exploring, I remember, when and Eagle flew overhead, he would spread himself out in an attempt to make himself invisible so I thought. I remember stroking him and purring, I had this strange thought that he was becoming almost human. It was after some time, discovering Laura's works, and reading the transcripts, that I discovered, that Yes, It was possibility.
One evening I was tired after work, he wanted to go out and explore, I initially refused, it was strange, he purred and growled, and stomped one of his front paws, like a child with a temper tantrum, I gave in, he had always returned and found him curled on one of my dining chairs.
Only this time, he never returned, my neighbor told me of an unholy racket, from coyotes, and I suspect that was his fate. I don't mean to distress you, but I have also thought, that it was his time to make a transition.
To this day, I have fond memories of our time together, and still miss his presence, there is a place in my heart for him.
I hope you find your furry friend and family member, like all of us on planet, earth, maybe, it was time to depart, to go on to greater and better experiences.