I know you miss your Peanut very much. This kind of loss affects people in very different ways. Your grief appears profound.
I can’t tell you if you should get another fur baby. Only you can make that decision. What I can say is that is possible to grieve for a lost pet and love another simultaneously. Bringing another dog into your home is not disrespectful to Peanut’s memory. Instead, it allows you to bring tremendous love to another animal, which may make healing easier.
Perhaps you could explore how you feel by interacting with other fur babies at a shelter or in a friend’s home. If that is soothing and rewarding for you, you might consider another pet.
I have lost six beagles during my 60+ years and have very happy memories of all. I loved them all equally. There are no replacements for a lost pet, but love isn’t reserved for only one special companion. There are many who would relish your attention and companionship.
Let your heart guide you, regardless of what you decide. Just know that Peanut would want you to be happy, even though she has left her earthly home. Her love for you transcends time and distance.