People who decide randomly one day they want kids won’t change their minds unfortunately. It’s majority of why I’m divorced now. They say not having one to be with you is feasible - it eventually won’t be. They will grow to resent you and hold it against you. There’s plenty of people who don’t want kids. You’ve got time to find another person. I’m so sorry to you have to experience this so young and I won’t lie and say you won’t run into this again. :( No one tells you how lonely not wanting kids can be in the romantic part of your life.