I don't want kids?

It seems like everyone is having baby fever but I just don't want them... like ever. I don't even want to want kids. I've never imagined my life with a kid, and I like that. I want to get married, but I like the idea of a life not tied down because of a kid. I don't want to give up on the freedom of not having a child. It seems like everyone has a problem with that though, and I don't get it. People tell me it's wrong and selfish. How though? Why would I bring a child into the world if I'm not sure that I want one? I understand that my opinion could change but I don't think it will and I don't really want it to. Idk I guess I'm just wondering if there's anyone else who feels that way