What is the next pet you planning to get?

I don't know yet, but hopefully one I can't get really attached to. It hurts so bad to lose a pet....I really don't want to go through that heartbreak again, but my partner is hinting for another dog. I wonder if any breeds are more independent and less likely to get attached to, although I have a friend who grieves still for his 8 year old goldfish who passed away, so I'm thinking it's impossible to have a pet and not get really attached to it.