Guilty party looking for reassurance

Hi! So I have a female black lab and she’s my whole world, but lately me and my partner have had the second dog itch and we found a black lab puppy and fell in love with her. Of course I have all kinds of anxieties about bringing a new dog to our house, but I love her already and my current dog is such an easy, friendly girl, I think they will be a good match! My problem is my first dog is adopted and this one will be bought and while my partner doesn’t necessarily have a problem with this, in a country with so many abandoned dogs, I feel so guilty for paying for a life, if that makes sense. Anyone has similar experiences? How did you deal with them?