I don't think it means anything other than that you haven't found the right dog yet. I fell in love with my foster, but she wasn't a good fit. I'm still upset that I gave her up. It sucked. I wanted to keep her forever, and she felt the same. She was such an easy dog.
I inquired with several other breeders, no response, no response, and then the one who responded was an asshat to me. I stopped looking at Dobermans and inquired with Moxie Collies. I ended up basically on the wait list for a Collie puppy, and my breeder called me out of nowhere saying Sizzle referred her to me, and she had a girl puppy who needed a home at 12wks. Everything just felt right, and I was certain about my decision. She's also the best dog I've ever lived with. Once things were right, it all fell into place. The wait sucked, though.