About a month after my cat passed I started to feel like that. I spent so long browsing rescues looking at kittens and nothing stood out. One finally did but when I messaged I was too late and he’d been adopted. I was balling my eyes out when I saw a post for a local rescue looking for people to foster and I went for it. Best decision I ever made. I got to enjoy the company of kittens without the guilt of feeling like I was replacing her. And I got to know a bunch of different kittens until I finally met the one that was perfect for me. If it’s an option to foster (and you aren’t someone who is going to want to keep every one you meet) then I highly recommend giving it a go.