Everyone is different. Some people do need the companionship of another dog/or cat pretty quickly. Others need time. I had 3 dogs, lost first one and did not get another. However after they were all gone, within a short time I was ready for another dog. You have your cat, still your comfort and a place for your heart to share. Go by what YOU feel, and when you are ready.

Now, I have a few photos of my dogs up. They were "family" and I don't take down/away grandmas picture because she passed away, so keep those pictures around and enjoy the warm memories they will give you.