My 9 yr old dog just died, should I get another one?

Our nine year old dog died a couple of months ago. (miniature schnauzer) We missed her terribly and decided to get another dog. Researched breeders and picked up a mini schnauzer puppy about three weeks ago. precisous dog. But, we are older, and retired, and had forgotten the amount of work involved in having a puppy. We kept her two weeks and gave her all of our attention, just wearing ourselves out. Due to our retirement age, decided to take her back to the breeder. The breeder was very kind and said she would hold onto the puppy for us for two weeks. Now, I am dealling with the grief of losing the 9 year old dog to cancer, as well as missing the new puppy and a dog's companionship. i've lost family members etc before and know what grief is. But the grief i feels now after losing two dogs is difficult to bear. We decided to take the puppy back because not wanting the responsibility. The decision was made in a rational state of mind and I logically know the puppy will be ok. However, I miss her. Will this p? or should I just realize that I will always miss the loyal companionship of a dog and get her back from the breeder? I guess I am struggling with why i have such an attachment to a dog. thanks in advance for any kind and or insightful answers you may have...