Awww, I'm sorry you are so blue @aibusux2u and of COURSE YANBU! As has been said, a pet is part of the family, particularly dogs and cats. I love my tabby cat (almost 15) so much, and dread her passing! She is like a cute puppy.
She is old, but still very much a kitten at heart, very playful and loving, and she likes lots of cuddles and hugs, and spends lots of time sitting on mine of DH's lap, or sitting between us on the couch. Some days, she follows me everywhere when I'm in the garden, just purring and mewing, and snuggling against me, and I adore her.
I have to say I have a huge fondness for female cats and dogs. Had 5 or 6 (all male) dogs as a child, and they were lovely, sweet, playful souls. But when I was 13 y.o. we got a female dog, and she was the most affectionate, loving, sweetest, most adorable creature I had ever met.
The favourite of all the dogs we had.
I left home at 20 (when she was 7,) not only home, but the town I grew up in too, and I missed her more than any family member!
I missed them, but missed her more! I visited quite often and she made a real fuss when she saw me! I moved back to town after 3 years, and she was 10 then. I moved into a flat close to my parents (and doggo!) and saw her most days. At 12, she died.
I was devastated. I loved her so much. 
Me and DH have always had cats - 3 of them. All female. All loving, affectionate, and cute and playful. Never wander(ed) more than 2 minutes walk from the house either. Never had dogs as our lifestyles would not have been great for dogs. We could not have been able to give a dog the attention, the time, and the life it would have deserved.
Time will heal, but your doggo will always have a place in your heart.
She was so lucky to have you. 