I am childfree but I would never say never because I don't know who I will become in the future. All I can say is I don't want children NOW and I think it's unlikely I will want kids in the future. I don't need to cling to an identity of being anti-natalist. No shade to women who do. But for me, I'm happy with saying how I feel now, and my partner is good with that! So no worries! :)
Instead, I'm becoming an egg donor! So I can help women who DO want kids. :)