If you've already committed to being child-free in your head and heart--that's okay-- but your partner needs to know long before the wedding or it's not fair to anyone. You need to be on the same page as your partner when it comes to these huge life decisions. Be real. Be mature. Share your truth.
Gaslighting is a term used to describe a form of psychological abuse where someone makes you doubt not only yourself and all you know, but also your sanity, your memory, and perceptions of reality.
If they say they don't love you or don't want to see you anymore--take it at face value. Why would you want to be with someone who doesn't love you? Remember you always deserve the best--don't settle. You wouldn't want to hear that someone 'settled' for you...that would be very sad.