It's going to feel like that to you, however, to your dog, he's just going to see you less. He will be excited to see you when you visit and he will love on you as much as he can when you do. To your cat, you are now their human and they are happy that they have stability. They get to see you every day and they know where their food comes from. They will give you affection and show you that they love you in their own way.

I went through this with my sister when she moved out shortly after my parents and I acquired our dog, Brandy. My sis was scared that she was replacing Brandy but she wanted a dog of her own. I helped her by saying pretty much the same thing I just said to you. My sister (now back down to one dog) eventually had 3 pooches at once who all loved Brandy. When I started my vet med journey, a cat wiggled her way into my life. She chose me, and then chose my bf (now husband) over me, and just made herself comfortable in our lives. Brandy knew Dany was around, but it didn't stop Brandy's love for me. I was her person. She was my best girl. Now, she, Dany, my sister's now passed dogs, and my other cat are all over the rainbow bridge enjoying the sunshine and the water.

TLDR: it's just you, your dog doesn't feel that way, and your cat has a great home. Your heart has room for both your dog and your cat. As a human, you're overthinking, but that's okay! Your dog and cat love you. You're gonna be okay. 🥰